Non Domestic Survey Guide
Non-Domestic Energy Assessment Procedure
Survey Guide
VERSION: 1.2
NEAP is the official procedure for the calculation of energy performance of non domestic buildings in
Ireland for the purposes of producing Building Energy Ratings (BER).
This document describes the NEAP survey methodology for non domestic buildings. The NEAP
Manual (iSBEM User Guide) detailing the assessment methodology for non domestic buildings must
be followed alongside this document.
BER Assessors, building designers and other users must ensure that they are using the latest version
of this document and accompanying software. Information and any updates will be published on the
SEAI website at www.seai.ie/ber .
Full site surveys are to be carried out for “New-final” or “Existing” building assessments. “Newprovisional” ratings do not require a site survey as the provisional rating is carried out off plans and
specifications for buildings at design stage.
A BER Assessor is required to act with integrity and diligence to ensure that each BER assessment is
executed competently, in an independent manner and in accordance with the Regulations, the BER
Assessor’s Code of Practice and all other directions issued by SEAI. In this regard a BER Assessor is
responsible for ensuring that, within reason, the data compiled and inputted to SEAI approved
calculation software and all other related and recorded calculations are an accurate representation of
all characteristics relevant to the energy performance of the building and are capable of being
verified as such in any subsequent monitoring and compliance processes commenced by SEAI in
accordance with the BER Quality Assurance System and Disciplinary Procedure.
Published by:
Sustainable Energy Authority of Ireland, Wilton House, Dublin 2
October 2013
Contacts:
t
1890 734237
e
info@ber.seai.ie
w
http://www.seai.ie/BER
Copyright © 2013 The Sustainable Energy Authority of Ireland. All Rights Reserved
NEAP Survey Guide
Version: 1.2
Contents
KEY CHANGES AND ADDITIONS
3
1
INTRODUCTION
4
2
PRE-SURVEY INFORMATION REQUEST
5
3
SURVEY DOCUMENTATION AND EQUIPMENT
6
4
DATA GATHERING
7
4.1
External Survey
8
4.2
Internal Survey
8
4.3
Building Sketches and Architectural Drawings
8
4.4
Floor by Floor Survey
9
4.5
Plant Room Survey
9
4.6
Ceiling and Floor Voids
10
4.7
Attic Spaces
10
4.8
Missing or Non Operational Building Services Equipment
10
5
BER ASSESSOR USING ASSISTANCE TO GATHER INFORMATION
10
6
GUIDANCE ON SUPPORTING EVIDENCE
11
6.1
7
Non Default Efficiency Data
12
INFORMATION REGARDING INDIVIDUAL ISBEM INPUTS
13
Appendix 1: The NEAP Survey Form
52
Appendix 2: Zoning Example
58
Appendix 3: List of Activities
60
Appendix 4: Default Data
64
Appendix 5: Non-Domestic Building Services Compliance Guide: 2010 Example.
78
Appendix 6: Determining Zone Heights and U-Values
81
Appendix 7: Identifying the Heating System
85
Appendix 8: Adjoining Conditioned and Unconditioned Spaces
89
Appendix 9: Determining the Hot Water Storage Volume
94
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Appendix 10: Selection of Solid Fuel Type.
96
Appendix 11: Identifying Common Lighting Systems
97
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Key Changes and Additions
This section summarises the key differences between the current NEAP Survey Guide (V1.2) and V1.1.
SECTION
SUMMARY OF CHANGE
Section 1: Introduction
Verification of requirements for publication of BERs and use of
alternate software.
Section 4: Data Gathering
Clarification on use of "As Built" and "Construction" drawings
Section 4: Data Gathering
Clarification on use of photos as documentary evidence to
support entries in SBEM
Section 4.8: Data Gathering
Guidance on missing or non operational building services
equipment
Section 6: Guidance on Supporting Evidence
Definition of a suitably qualified engineer/architect
Section 6: Guidance on Supporting Evidence
Clarification on calculation of Non Default thermal properties for
Section 7: Heat losses for different building elements
building elements
Section 6.1: Non Default Efficiency Data
Clarification on acceptable sources of Non Default Efficiency Data
Section 7: Heating system efficiencies
Section 7: Window U-value, T-Solar and L-Solar
Clarification on treatment of films/ signage applied to glass for
promotion
Section 7: Thermal Bridges
Update on acceptable PSI value calculation to meet NEAP/ TGD L
Section 7: Electricity Power Factor
Clarification on demonstrating selection of non default Power
Factor data
Section 7: ECA/ACA data
Clarification on use of data from ECA/ACA webpages
Section 7: HWS / Generator Type
Guidance on addressing multiple HWS systems in building
Section 7: HWS / Generator Type
Section 7: Lighting Parameters not available
Section 7: Deadleg length in this zone
Section 7: Local Manual Switching
Section 7: Photoelectric Options
Appendix 2
Appendix 4.1: Age of Building
Appendix 4.2: Constructional Types
Appendix 4.2: Constructional Types
Appendix 4.3: HVAC System Defaults
Appendix 4.4: HWS System
Appendix 4.8: Shell and Core Buildings
Appendix 4.9: Unheated Buildings
Appendix 4.10: LED Lighting
Appendix 4.11: Display Lighting
Appendix 4.12: Non Default Km value
Appendix 6: Determining Zone Heights and U-values
Appendix 7: Identifying Heating System
Appendix 8: Adjoining Conditioned and
Unconditioned Zones
Appendix 9: Determining DHW Storage Volume
Appendix 10: Selection of Solid Fuel Type
Appendix 11: Identifying Common Lighting systems
Guidance on addressing HWS allocation in multiple tenants/
premises buildings
Guidance on multiple lighting systems in a zone where splitting
the zone is not practicable
Guidance on measurement of Deadlegs in zone
Guidance on local manual switching
Guidance on identifying photoelectric sensors
Further guidance of zoning in corner offices
Clarification of use of default constructions and uninsulated
elements
Guidance on the selection of default elements based on building
age and element type
Clarification on the selection of window and frame types
Clarification on the selection of default HVAC systems
Clarification on selection of DHW storage age
Clarification on Shell and Core HVAC systems
Guidance on entering unheated buildings into iSBEM
Guidance on entering LED lighting into iSBEM where full lighting
design is not available
Guidance on addressing selection of energy efficient lamps for
display lighting when no display lighting is present in zone.
Clarification on calculating non default Km values and values for
Specific Heat Capacity for typical elements
Guidance on calculation of zone heights and U-values
Guidance on identifying heating systems within buildings and
zones
Guidance on adjoining conditioned and unconditioned spaces
Guidance on the calculation of HWS Storage volumes
Clarification over the selection of the appropriate solid fuel.
Assistance in identifying Lighting Systems
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NEAP Survey Guide
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Version: 1.2
Introduction
This guide is designed to assist Building Energy Rating (BER) Assessors to carry out BER assessments on new
final and existing non domestic buildings using iSBEM or other approved software 1.
This manual does not replace the iSBEM User Guide, NEAP Modelling Guide or SBEM Technical Manual. It
provides additional guidance relating specifically to surveying of non domestic buildings and should be read
in conjunction with the iSBEM User Guide, NEAP Modelling Guide and SBEM Technical Manual or other guides
associated with the approved software being used by the Assessor.
In addition to providing guidance on the surveying of buildings, this Survey Guide indicates the necessary
supporting data or evidence required when completing BER assessments on buildings, particularly when
using values other than the defaults.
The current published version of the NEAP Survey Guide is available on www.seai.ie/ber.
When conducting a survey, BER Assessors must comply with the Safety, Health and Welfare at Work Act 2005
and regulations under that Act, as well as all other applicable health and safety legislation, regulations, codes
and guidelines. It is the BER Assessor’s duty to make himself or herself familiar with the relevant health and
safety rules, to exercise due diligence during the survey and to prevent unreasonable risk of harm or injury.
Please refer to the Health and Safety Authority website for further information: www.hsa.ie .
BER Assessors are solely responsible for undertaking surveys in a safe manner. The BER Assessor should under
no circumstances expose himself or herself, or any other person, to unnecessary risks of harm or injury in
conducting a building survey. The BER Assessor must be mindful at all times of health and safety issues and,
where the BER Assessor has reason to believe that obtaining any of the information set out in this document,
or any other associated guidance provided by SEAI, may involve such risks, the BER Assessor need not and
must not attempt to obtain that information.
SEAI and its agents accept no liability or responsibility for any damage, injury, death, breach of contract or
negligence in respect of any dispute, claim or cause of action arising out of, or in relation to, any BER
assessment.
Surveys are expected to be non-invasive. Nothing in this document, the iSBEM User Guide or any other
associated guidance provided by SEAI, shall be understood as requiring invasive surveys. Where, despite this,
BER Assessors or their client carry out invasive surveys this is carried out at the BER Assessor’s and the building
owner’s own risk and is not required by SEAI.
If invasive survey methods are used such as to demonstrate non-default data, then, while these methods are
not required in the BER assessment methodology, they can be considered as a source of supporting evidence.
1
Throughout this Guide, the term “Approved Software” is used to denote iSBEM and other SEAI approved BER software as published on
the SEAI website.
Assessors who have been accredited to use alternate software should note the following:
• Non default values should be used where possible, however where these cannot be substantiated default values must be
used. The default values to be used are as outlined in the iSBEM User Guide, iSBEM software and the NEAP survey guide. It is
the responsibility of the assessor to ensure that any defaults used in alternate software comply with the iSBEM software and
aforementioned documents. Third party software does not necessarily use or provide the same defaults as iSBEM.
• In all cases, the methodology outlined in the iSBEM user guide, and NEAP Survey Guide takes precedence over guidance from
third party software.
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This supporting evidence for each relevant exposed surface must clearly indicate that the non-default data
being specified is appropriate for the building element in question.
Where the survey requires access to the Building Management System (BMS), the Assessor should seek out
assistance from the Facilities Manager/ Building Operator and take due care and consideration not to interfere
with the setup of the BMS.
BER Assessors are required to adhere to the BER Assessor’s Code of Practice at all times and the definitions in
the iSBEM Manual must be followed at all times.
The survey guide should be read in conjunction with the following documents
• iSBEM User Guide
• NEAP Modelling Guide and SBEM Technical Manual
• BER Assessors Code of Practice
• BER Quality Assurance System and Disciplinary Procedure
• Non Domestic Building Services Compliance Guide (UK)
• Non Domestic BER Technical Bulletins
Information required on Building Regulations
http://www.environ.ie/en/TGD.
Part L (current or previous)
is
provided
on
A Building Energy Rating is required under the following circumstances:
•
When a new or existing building is offered for sale (or let) a BER certificate must be produced by the
vendor or their agent (e.g. auctioneer, estate agent or solicitor) to potential buyers or tenants.
•
When a new building is offered for sale "off plans" a provisional BER certificate must be produced by
the vendor to potential buyers or tenants, based on the pre-construction plans; and when the same
new building is completed, a BER certificate must be supplied to the purchaser, based on a survey of
the buildings as constructed (to take account of any design changes during construction).
•
When a new building is built for a specific owner-occupier: A BER certificate must be procured by the
person commissioning the building, prior to taking up occupation of the building.
•
A person offering a property for sale or rent on or after 9th January 2013, or their agent, shall ensure
that the energy performance indicator of the current BER certificate for the building is stated in any
advertisements, where such advertisements are taken relating to the sale or letting of that building.
•
Prospective buyers and renters will be shown the BER rating (Alphanumeric value) along with other
prescribed content (dependent on the particular medium) in a prominent location in each specific
advertisement
•
Where images of the property are used then the presentation of the alphanumeric value will be by
way of the prescribed BER Alphanumeric Rating Motif for the particular property rating
2
Pre-survey Information Request
Prior to carrying out the survey, the Assessor should formally request from the building owner/representative
information such as:
•
•
•
Age of building;
Details of planning permission (reference, date);
Access to architectural drawings and specifications for layout configuration and details of
construction;
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Version: 1.2
Access to any mechanical and electrical drawings or specifications to assist the Assessor in
determining the nature of the equipment installed;
•
•
Details of building type and activities within the Building;
•
•
•
Certification to prove that the ducting was pressure tested;
•
Any additional documentary evidence that the owner feels is important.
Details of any modifications made in the building e.g. insulation upgrading, additional/upgraded
controls, new lighting, new boilers, additional equipment, extensions, etc.;
If the HVAC system is separately sub-metered and if so, where the meters are located;
Any other information related to the heating, cooling, ventilation and air conditioning (HVAC)
systems which may not be obvious but may have an impact on the BER;
Where such information is available, documentary evidence should be obtained (rather than verbal briefing).
Any documentary evidence of upgrading must clearly relate to the building concerned and must be
sufficiently detailed in its scope. The substantiation that would be acceptable for QA audit purposes is
detailed in Section 7 of this document and where such evidence is used for BER purposes, a copy of this
evidence must be retained by the Assessor and provided to the SEAI BER QA auditors on request.
The Assessor should inform the owner in writing that access to all areas in the building including boiler
rooms, any hatches which provide access to insulation, controls and pipework will be required in order to
carry out the survey.
3
Survey Documentation and Equipment
A number of items should be brought to the survey site to enable the successful conduct of the survey of the
building. These include (but are not limited to):
Documentation:
•
Approved Software Manual;
•
NEAP Survey Guide;
•
The NEAP Survey Form (Appendix 1), or similar data collection sheet/drawings (also available in
electronically editable format on www.seai.ie/ber ).
•
Pencil, paper and eraser;
•
Graph Paper (for sketching building plans and elevations);
•
Architectural plans for the building where available;
•
Any other available specifications for the building.
Equipment:
•
Measuring tape. Electronic measuring devices may be used, provided all measurements are
accurate and the equipment is properly calibrated;
•
Calculator;
•
Directional compass;
•
Flashlight;
•
Camera with flash (with macro capability to ensure text is clearly legible);
•
Key for electricity meter and key for gas meter (standard tools will not open gas or electricity
meters);
•
Ladder (to facilitate inspection of ceiling voids and access to any roof where plant is located);
•
Personal protective equipment as necessary.
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Data Gathering
For all data gathered, supporting documentary evidence is required to substantiate any entries in the NEAP
software. This documentary evidence must be retained by the Assessor as outlined in the BER Assessor’s Code
of Practice. BER Assessors must endeavour to gather as much data, photographs and supporting evidence as
possible to increase the likelihood of an accurate survey and assessment which will stand up to auditing by
SEAI.
The list of supporting evidence detailed in this guide is for guidance purposes and will be added to over time.
Other methods/supporting data may be considered by SEAI on a case by case basis, as they arise.
Where “As Built” drawings and specifications are available for a building, it is the responsibility of the Assessor
to verify that the data is accurate through a site survey and to ensure that any data input into the NEAP
software is accurate. In verifying “As Built” drawings, assessors should have documentary evidence from the
site survey to support the drawings, for example; marked up drawings showing measurements on site,
photographs and completed survey forms from site survey.
“Issued for Construction” drawings can also be used as documentary evidence to support a BER, however the
“Issued for Construction” drawings must be supplemented with documentary evidence from a site survey.
For example an Assessor has “Issued for Construction” drawings from the M&E consultant detailing the
lighting installation. The Assessor should provide additional information to substantiate that the lighting was
installed as per the “Issued for Construction” drawings. This should be:
• Photographs of the light fitting as installed.
• Survey Sheet detailing the light fittings as installed.
If clarification is required by the BER Assessor, specific queries related to the acceptability of supporting
documentary evidence should be directed to the BER Helpdesk prior to the publication of a rating.
The NEAP Survey Form (Appendix 1) assists Assessors in ensuring that they have gathered all the necessary
documentary evidence during the survey of a building. This includes data regarding the dimensions, building
age, building fabric elements, relevant items per room, HVAC system(s), hot water services, HVAC controls,
lighting and lighting controls. This should be accompanied by building sketches/architectural drawings and
comments related to various aspects of the site survey.
In addition to the above, the assessor is required to provide photographic evidence to support data gathered
during the survey of the building as detailed in Section 7 of the Survey Guide. Assessors should reference the
photograph applicable to each zone on the survey form, for example:
The reference used on the survey form should correlate to the name of the photograph filename supplied as
documentary evidence during the audit process.
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Photographs must be clear. Assessors should read the camera’s manual to gain a full understanding of how
the camera is operated, paying particular attention to the use of flash, macro and focus.
The following simple tips should also be adhered to:
• Ensure that the camera is set up correctly prior to taking the photograph. It is important to ensure
that adequate resolution is set up.
• Hold the camera steady;
• Give the camera time to focus;
• For close-up shots, the camera’s macro function may take several seconds to gain correct focus;
• Use the flash in poorly lit spaces (the camera’s auto-flash setting will do this automatically, generally
with good results);
• When using the flash on a object several metres away try to ensure there are no objects in the
foreground as this can affect the focus and/or over-expose the photograph;
• Check the photograph. If it is not of sufficient quality, retake the photograph.
4.1
External Survey
An initial survey of the outside of the building should be carried out. The following information can be
gathered by external survey:
•
External measurements to establish/check the overall footprint of the building. External
measurements must be converted to internal measurements before calculating floor area and
heat loss areas;
•
Establishing ventilation features such as number of vents, extract fans, air intakes and external air
handling plant;
•
Assessing age band indicators, such as meter box date information;
•
Confirming the orientation of the building using a directional compass;
•
Establishing which walls of the building are party walls and determining, as far as possible, the
•
Establishing shading characteristics;
•
Details of any renewable technologies, such as solar panels and wind turbines;
•
Establishing any external plant rooms/ energy centres serving the building.
nature of the activity of the adjoining buildings;
4.2
Internal Survey
An initial walk around inside the building is very useful and assists in determining the following information:
•
Confirming the Building Activities;
•
Confirming the various HVAC systems within the building;
•
Confirming the various Lighting and Lighting Control systems within the building;
•
Confirming heat loss envelope elements such as ground floor type(s), wall types, window
variations and in completing survey sketches for each floor, zone, wall and other element types;
4.3
•
Assessing age band indications such as date stamp in the gap within double/triple glazing;
•
Confirming the ventilation as indicated from outside the building.
•
Identifying internal elements with high thermal mass composition.
•
Identifying elements adjoining unconditioned spaces.
Building Sketches and Architectural Drawings
A sketch of the building must be made showing plans and elevations. Where architectural drawings are
available, these can be used instead of sketches, provided any differences between the architectural drawings
and actual measurements taken on site are noted on the architectural drawings by the BER Assessor. The
sketches and/or architectural drawings must be kept on file as supporting evidence for the BER assessment.
The dimensions used in the NEAP assessment should reflect the actual measurements taken during the
survey. Sketches/drawings, combined with the Survey Form and other evidence as outlined in this document,
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are required to support data entered in the data file to complete a BER assessment using the iSBEM or other
software.
As a guide, the sketches/drawings should at least indicate the following:
•
Each zone entered in NEAP software;
•
Activity in each zone
•
Different walls, floors and roof types;
•
Dimensions (total floor area, zone areas, wall thickness, floor heights, element dimensions);
•
Unconditioned spaces – identifying elements between conditioned and unconditioned spaces;
•
Adjacent buildings (beside party wall);
•
Openings:
-
Door types, dimensions and orientations (with estimate of percentage glazing);
-
Window dimensions and orientations;
-
Type(s) of glazing (e.g. single glazed, double glazed, any information about filling or glazing
type);
-
Opening frame type(s) (PVC, Wood, metal and estimate of thermal break if possible to
determine);
•
4.4
-
Measured gap between panes if possible, not including the thickness of the glazing panes;
-
Overshading estimate on each opening;
Extensions/ alterations to the building – identifying where the age of the building differs.
Floor by Floor Survey
A sketch or architectural drawing must be provided for each floor showing partitions, wall openings and
zones. Where architectural drawings are used, it is the responsibility of the Assessor to ensure the accuracy of
the drawings in relation to the finished construction; therefore architectural drawings must be altered to
reflect changes in the finished building.
Each room/area must be checked for the following:
•
Activity in each area;
•
Type of HVAC in each area and how it is controlled;
•
Type of lighting and how it is controlled;
•
Any additional ventilation, separate to the main HVAC system in each area;
•
Properties of openings such as:
•
-
Type of glazing (double, single, triple, stamp/brand on windows);
-
Dimensions;
-
Frame type;
-
Gap between glazing;
-
Overshading;
-
Orientation;
Room heights.
This information should all be collected in the NEAP Survey Form (Appendix 1).
Refer to Appendix 2 for Guidance on Zoning, Appendix 3 for a List of Activities and Appendix 6 for examples
of zone height calculation.
4.5
Plant Room Survey
Each plant room should be surveyed with particular reference to the following.
-
Boiler plant;
-
Refrigeration plant ;
-
Air handling units;
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-
Fans;
-
Calorifiers;
-
Heat exchangers;
-
Heat recovery equipment;
-
Controls related to all building services plant.
For all plant items, eg, boilers, refrigeration equipment, air handling units, fans, humidifiers, heat recovery
units, heat exchangers, hot water calorifiers, pumps, nameplate details must be recorded where accessible
and a photo must be taken to facilitate later identification of the equipment concerned in support of data
entered in the data file.
4.6
Ceiling and Floor Voids
Accessible ceiling and floor voids must be inspected to determine what equipment, particularly HVAC
equipment, is present. This provides useful information as to the type of HVAC used in the building. Where
possible, photos should be taken to demonstrate the HVAC systems present.
4.7
Attic Spaces
Useful building compositional properties can be determined by accessing the attic space where such exists:
-
Evidence of wall and roof construction;
-
Roof insulation thickness.
Particular attention must be paid to health and safety issues when accessing attic spaces and ceiling voids.
4.8
Missing or Non Operational Building Services Equipment
NEAP assumes that the fixed installed building services equipment is operational and takes no account of
whether it is working or not. However where a system is missing and therefore not installed, the system
should be based on the default for the system.
For example in the case of a building served by a central heating system with radiators and the boiler is
missing or removed, the assessment should be based on a default HVAC system (refer to section A4.3) as
there is no heat source in the building. Similarly, if there are no space heat emitters, the boiler cannot heat the
building and therefore a default HVAC system should be assumed.
In the case of a missing or removed cylinder, where the cylinder is required to provide hot water, effectively
there is no facility to heat hot water and therefore a default HWS system is used (refer to section A4.4).
In the case of controls that are not operational but are installed, for example lighting controls, it is assumed
that they are operational and should be accounted for.
5
BER Assessor Using Assistance to Gather Information
BER Assessors are required to abide by all the terms and conditions outlined in the Code of Practice for BER
Assessors. This includes the condition that a BER Assessor must take full responsibility for each BER
assessment that he or she carries out. Where a BER Assessor is required to visit premises being assessed, the
BER Assessor is responsible for:
• the collation of the data required for the assessment;
• ensuring that, within reason, the data compiled is an accurate representation of all characteristics
relevant to the energy performance of the building;
• verification of data in any subsequent auditing, monitoring and compliance processes commenced
by SEAI.
Refer to the SEAI BER Quality Assurance and Disciplinary Procedure and the BER assessors Code of Practice for
further guidance.
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Guidance on Supporting Evidence
As a general rule the default values in NEAP are conservative and must be used unless non-default values can
be supported through acceptable documentary evidence or evidence recorded on site. Assessors are
expected to make reasonable efforts to confirm that any defaults values used are selected correctly and only
when non-defaults are unavailable.
The following diagram illustrates the order of priority for each data item in a BER assessment.
a) The actual data observed on site takes precedence.
b) Where the data item is not observable, it should be detailed using documentary evidence. Documentary
evidence must be retained with the assessment records.
c) Where the data item is not observable on site or via documentary evidence, then a default is used.
NO
Detail observable on site?
YES
1) Choose detail as
observed and record on
sketch/survey form
Detail available from acceptable
supporting documentation?
YES
2) Choose detail based
on acceptable
supporting
documentation and
retain documentation in
assessment records
NO
3) Choose
detail based
on defaults
This order of priority must be considered for all parameters entered in the NEAP software. For example, the
Assessor is expected to take details of the boilers, check their efficiency as outlined in Section 7 of this
document and to use this value if it differs from the default value. As part of an SEAI audit, the Assessor is
expected to show that reasonable efforts were made to ascertain non-default values rather than opting for
default values. In all cases, supporting evidence must be obtained and retained by the Assessor for all nondefault values used.
Non default values can be supported by a range of documentation as outlined in Section 7. Examples of
documentary evidence include “As Built drawings, Reports of works, Photographs, Copies of invoices/ receipts
etc.
The copy of invoices/ receipts must have a detailed description of the work concerned and must clearly
identify the work with the building concerned.
Reports of works carried out in the building from a suitably qualified supervising engineer or architect are
acceptable as supporting documentary evidence. A suitably qualified person is defined as a FETAC level 7
qualification or higher in one of the following building construction related disciplines:
• Architecture
• Architectural Technology
• Building Services Engineering
• Civil Engineering
• Electrical Engineering
• Mechanical Engineering
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• Quantity Surveying
Such reports need to provide sufficient detail for the NEAP entry in question.
For example, for retrofitted insulation, the invoice/receipt or report should detail the property address,
material type, thickness and thermal conductivity, density of fill, etc. Thermal conductivity values for common
building materials in new and existing buildings can be obtained from Building Regulation TGD L – Buildings
Other Than Dwellings (Table A1) or from CIBSE Guide A. For existing and new-provisional buildings, Building
Regulation TGD L (Table A2) or CIBSE Guide A may be used to determine the thermal conductivities for
insulation products; however the preferred option is that thermal conductivity values are obtained for specific
insulation products and the data should be obtained from accredited test data (for example an Agrement
Certificate from the NSAI) in compliance with the relevant standards in TGD L. For new-final BERs, thermal
conductivity values for insulation products must be obtained from accredited test data to the relevant
standards in TGD L.
General Guidance on the Calculation of U-values to the relevant standards is contained in Report BR 443
“Conventions for U-value Calculations” 2006. For building elements and components generally, the method
of calculating U-values is specified in I.S. EN ISO 6946: 1997. U-values of components involving heat transfer
to the ground, e.g. ground floors with or without floor voids, basement walls, are calculated by the method
specified in I.S. EN ISO 13370: 1999. Software packages to perform U-value calculations for different building
elements in accordance with the relevant standards above are readily available. Details, such as element
thicknesses, thermal conductivities and resistances, used in carrying out U-value calculations must be
retained in the BER assessment records by the BER Assessor.
Where there is adequate documentary evidence to support a non-default U-value, a non-default km value
must also be used based on the makeup of the construction. The km value is calculated in compliance with
CEN standard: EN 13790 using the method in 7.4.1 of the iSBEM User Guide. The km value is the effective
thermal capacity of an element and accounts for the time it takes for heat to flow in or out of the building
fabric. Refer to Section A4.12 for details on calculation of km values.
6.1
Non Default Efficiency Data
The following outlines acceptable sources of non default efficiency data for use in conjunction with the NonDomestic Building Services Compliance Guide: 2010:
•
Performance data on “CE marked” literature is acceptable provided that the literature refers to the
relevant test performance standard.
•
Literature from manufacturer referencing the efficiency and relevant test performance standard.
•
Accredited Test certificates clearly relating to the product in question or as verified by the manufacturer/
supplier as having the same performance as the installed product, must comply with the following:
o Installation instructions in the test certificate on which the stated performance depends must be
adhered to;
o Test certificates must be in English or be accompanied by a certified English translation. The
translation can be from the accredited test house or from a professional translator listed by the
Irish Translators and Interpreters Association or international equivalent;
o The relevant test performance standard must be stated on the test certificate;
o The test laboratory must be accredited. This may be demonstrated as follows:
 The governing accreditation body for the test laboratory can be found under
http://www.european-accreditation.org/ . This governing body may list the test
laboratory as accredited;
 The accredited laboratory may be found under
http://ec.europa.eu/enterprise/newapproach/nando/ .
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NEAP Survey Guide
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Version: 1.2
Information Regarding Individual iSBEM Inputs
The following tables supplement the software application manual (i.e. iSBEM User Guide) when gathering
data for buildings and in confirming compliance with Section 15 (Monitoring and Compliance) of the BER
Assessors Code of Practice.
Where documentation is used to substantiate non-default values, it must describe the nature of the work in
detail and leave no doubt that it is related to the building being assessed.
The list of supporting evidence detailed in this section is for guidance purposes and may be amended over
time. If in doubt whether or not the evidence recorded meets requirements in terms of evidence, the Assessor
should contact the BER helpdesk. Other methods/supporting data may be considered by SEAI on a case by
case basis, as they arise.
iSBEM Software Tab: “General”
Data Entry Item
Guidance
Documentary Evidence
Project Complexity
Complexity of the building for the purposes of
External/Internal photographs of the
the Building Energy Rating.
Building to indicate the complexity of
Building Type
Refer to Section 7.3.2 of iSBEM User Guide.
the building.
This is generally obvious; office block, school,
Internal photographs showing the
factory, warehouse, etc. This relates to the
building type;
current building use which may have changed
since the building was built, e.g. school house
converted to restaurant.
Architectural drawings;
Correspondence from client detailing
the building type.
The Building Type sets the activities that may
be assigned to the zones. Refer to Appendix F
of the iSBEM User Guide for a list of activities
associated with the building types. However,
alternative activities for other building types
remain available at zone level.
The Building Type defines the majority of the
building and is displayed on the BER
certificate.
Age of building
This is a key item of information because it
A copy of building legal documents
forms the basis for selecting default values
such as such as the contract to build,
which in turn have a significant impact on the
rating obtained.
final
build
contract
payment
certificate, completion cert, etc. are
the preferred evidence of age.
Similar methods must be applied when
determining the age of any extensions/major
refurbishments within the building.
In
the
absence
of
such
documentation, then a combination
of the following indicators, supported
by documentary evidence may be
used (a minimum of two indicators are
13
NEAP Survey Guide
Version: 1.2
Refer to Appendix 4 for the relationship
required) :
between the age of construction and relevant
•
Stylistic evidence;
•
Planning
building regulations.
permission
documents;
•
The “Year of Construction” is that of the
Building or development age
plates;
original completion date of the building.
Further information on the date of renovations
and extensions can be provided in the
•
Electricity meter age;
•
Glazing age printed within
•
Building owner’s knowledge
double or triple glazing;
“Location Description”.
(in writing).
MPRN number
The MPRN can be found on the electricity bill
Copy of utility bill for the building or
for the building. In the absence of electricity
as supplied by the utility provider.
bills, the MPRN may be printed in the
electricity meter box or this information can be
Photograph of the electricity meter
box.
sourced from the ESB. The MPRN extranet on
the Non Domestic National Administration
System (NDNAS) should be used to confirm
that the MPRN is correct.
Building Address
Address to identify the location of the building,
should be taken from utility bills.
14
Copy of utility bill.
The address should allow for unique
identification of the property in so far
as possible, and in such a way that
prospective purchasers or renters (or
their agents) can content themselves
that the rating before them in fact
relates to the property in question.
Assessors should confirm the address
with the client. Utility bills, An Post’s
address
verification
service,
Geodirectory and Bizmaps provide
other means of verifying the building
address.
NEAP Survey Guide
Version: 1.2
iSBEM Software Tab: “Project Database”
Data Entry Item
Heat loss roof Uvalues and Thermal
Capacity Value km
Guidance
Documentary Evidence
Default values to be used unless acceptable
The evidence required to use non-
evidence to support non-default values is
default building characteristics (eg, U-
available. Where default values are used,
values/ km values) are met by one of
evidence is required to support age of
the following:
construction and the type of construction.
•
“As Built” drawings showing the
makeup of the roof construction
Non-default values should be used where
including the insulation material
possible. The Assessor is expected to show that
used
reasonable efforts were made to ascertain
insulation;
actual values rather than opting for default
•
and
thickness
of
the
Photographs during construction
values. When using non-default U-values for a
of the element concerned which
roof
clearly
facade,
supporting
evidence
must
identify
the
superior
indicate that the relevant roof facade has
construction and that they are of
achieved the non-default U-value.
the building concerned;
•
Copies of invoices with a detailed
U-values and km values should be calculated
description
of
the
work
based on the standards outlined in Section 7.4
concerned
and
must
clearly
of the iSBEM User Guide and Appendix A of
identify
TGD L. Section 6 of this Survey Guide outlines
building concerned.
the
work
with
the
the relevant guidance and standards for Uvalue calculations.
Documents should indicate address,
date and insulation material and
Where
there
is
adequate
documentary
thickness used.
evidence to support a non-default U-value, a
Photographs/photocopies of
non-default km value must also be used based
documentation should be retained as
on the makeup of the construction. Section 6
supporting evidence.
of this Survey Guide outlines the relevant
guidance.
Where specific thermal properties are not
available for building materials in existing
buildings, details should be obtained from the
Building Regulations TGD L or CIBSE Guide A.
For
accessible
roof
void
areas,
ensure
insulation depth is established by taking the
average of a number of measurements.
Different U-values (e.g. Different depths or
materials) must be treated as separate roofs.
15
NEAP Survey Guide
Wall U-values and
Thermal Capacity
Value km
Version: 1.2
Default values to be used unless acceptable
The evidence required to use non-
evidence to support non-default values is
default building characteristics (eg, U-
available. Where default values are used,
values/ km values) are met by one of
evidence is required to support age of
the following:
construction and the type of construction.
•
“As Built” drawings showing the
makeup of the wall construction
Non-default values should be used where
including the insulation material
possible. The Assessor is expected to show that
used
thickness
of
the
insulation;
reasonable efforts were made to ascertain
actual values rather than opting for default
and
•
Photographs during construction
values. When using non-default U-values,
of the element concerned which
supporting evidence must indicate that the
clearly
entire wall has achieved the non-default
construction and that they are of
U-value.
the building concerned;
•
identify
the
superior
Copies of invoices with a detailed
U-values and km values should be calculated
description
of
the
work
based on the standards outlined in Section 7.4
concerned
and
must
clearly
of the iSBEM User Guide and Appendix A of
identify
TGD L. Section 6 of this Survey Guide outlines
building concerned.
the
work
with
the
the relevant guidance and standards for Uvalue calculations.
Documents should indicate address,
date and insulation material and
Where
there
is
adequate
documentary
thickness used.
evidence to support a non-default U-value, a
Photographs
non-default k m value must also be used based
documentation should be retained as
on the makeup of the construction.
supporting evidence.
Where specific thermal properties are not
available for building materials in existing
buildings, details should be obtained from the
Building Regulations TGD L or CIBSE Guide A.
The presence of additional insulation must be
supported
by
appropriate
evidence.
16
documentary
/
photocopies
of
NEAP Survey Guide
Floor U-values and
Thermal Capacity
Value km
Version: 1.2
Default values to be used unless acceptable
The evidence required to use non-
evidence to support non-default values is
default building characteristics (eg U-
available. Where default values are used,
values/ km values) is met by one of the
evidence is required to support age of
following:
construction and the type of construction.
•
“As Built” drawings showing the
makeup of the floor construction
Non-default values should be used where
including the insulation material
possible. The Assessor is expected to show that
used
reasonable efforts were made to ascertain
actual values rather than opting for default
and
thickness
of
the
insulation;
•
Photographs during construction
values. When using non-default U-values,
of the element concerned which
supporting evidence must indicate that the
clearly
entire floor has achieved the non-default
construction and that they are of
U-value.
the building concerned;
•
identify
the
superior
Copies of invoices with a detailed
U-values and km values must be calculated
description
of
the
work
based on the standards outlined in Section 7.4
concerned
and
must
clearly
of the iSBEM User Guide and Appendix A of
identify
TGD L. Section 6 of this Survey Guide outlines
building concerned.
the
work
with
the
the relevant guidance and standards for Uvalue calculations.
Documents should indicate address,
date and insulation material and
Where
there
is
adequate
documentary
thickness used.
evidence to support a non-default U-value, a
Photographs
non-default km value must also be used based
documentation should be retained as
on the makeup of the construction.
supporting evidence.
Where specific thermal properties are not
available for building materials in existing
buildings, details should be obtained from the
Building Regulations TGD L or CIBSE Guide A.
17
/
photocopies
of
NEAP Survey Guide
Door U-Value and
Thermal Capacity
Value km
Version: 1.2
Default values to be used unless acceptable
The evidence required to use non-
evidence to support non-default values is
default building characteristics (eg, U-
available. Where default values are used,
values/ km values) are met by one of
evidence is required to support age of
the following:
construction and the type of door installed.
•
“As Built” drawings/ specification
detailing the Door make and
Non-default values should be used where
model and copies of certified U-
possible. The Assessor is expected to show that
values;
reasonable efforts were made to ascertain
•
Copies of invoices with technical
actual values rather than opting for default
characteristics of the door, clearly
values.
identifying that it relates to the
building concerned.
U-values and km values must be calculated
based on the standards outlined in Section 7.4
Documents should indicate building
of the iSBEM User Guide and Appendix A of
address, date and details of the door
TGD L. Section 6 of this Survey Guide outlines
in question.
the relevant guidance and standards for U-
Photographs
value calculations.
documentation should be retained as
/
photocopies
supporting evidence.
Where
there
is
adequate
documentary
evidence to support a non-default U-value, a
non-default km value must also be used based
on the makeup of the construction.
Where specific thermal properties are not
available for building materials in existing
buildings, details should be obtained from the
Building Regulations TGD L or CIBSE Guide A.
18
of
NEAP Survey Guide
Version: 1.2
Window U-value, T-
Default values to be used unless acceptable
The evidence required to use non-
Solar and L-Solar
evidence to support non-default values for the
default building characteristics (eg, U-
U-value, T Solar and L Solar is available. Non-
values) are met by one of the
default values must be demonstrated for each
following:
of the entries for U-value, T-Solar and L-Solar.
•
“As Built” drawings/ specification
Otherwise, a default value should be used for
detailing the window make and
all. Where default values are used, evidence is
model and copies of certified U-
required to support age of construction and
values, solar and light values;
•
the type of window installed.
Original
installation
documentation from the installer
Non-default values should be used where
detailing
possible. The Assessor is expected to show that
model can be used if available (to
make
and
obtain certified data);
reasonable efforts were made to ascertain
actual values rather than opting for default
window
•
values.
Representative photographs of
the
window,
glazing,
gap
between
manufacturer’s
stamp
Non-default values for U-values, Solar and
pointing to certified data can be
Light
used as supporting evidence. If
Transmittance
values
supplied
by
manufacturers or suppliers are calculated
measuring
based on the standards outlined in Section 7.4
glazing panes, ensure that the
of the iSBEM User Guide and Appendix A of
thickness of the glazing panes is
TGD L. Reference must be made to the relevant
not included in the final glazing
standards in any documentation provided by
gap figure;
the manufacturer/ supplier.
•
the
gap
between
Copies of invoices with technical
characteristics of the window and
Film or signage applied to the glass to
advertise/ promote services or products is
regarded as occupier behaviour and should be
ignored for the purposes of the BER
assessment.
must clearly identify the window
relates to the building concerned.
iSBEM Software Tab: “Geometry > Project”
Data Entry Item
Guidance
Documentary Evidence
Building Infiltration
Use the air permeability default value of 25
Where a non-default value is used, a
m /h/m at 50 Pa unless a valid acceptable
copy of the pressure test certificate
pressure test certificate is available.
must be provided with the address of
3
2
the building being assessed and date
of the pressure test.
Pressure test certificates must be in
compliance with IS EN 13829:2000
“Thermal Performance of Buildings;
Determination of Air Permeability of
Buildings: Fan Pressurization Method”
and CIBSE Technical Manual TM23
“Testing Buildings for Air Leakage”.
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NEAP Survey Guide
Version: 1.2
Individuals/ organisations carrying out
pressure tests must also demonstrate
that they are competent to carry out
the testing.
Individuals
may,
for
example,
demonstrate competence to carry out
permeability tests on buildings by
being registered under the NSAI’s Air
Tightness Testers Scheme.
Additionally,
individuals
and
organisations
may
demonstrate
competence by being accredited to
carry out tests to I.S.EN 13829:2000 by
the Irish National Accreditation Board
(INAB)
or
any other bodies capable of providing
accreditation to ISO /IEC 17025:
“General Requirements for the
Competence
of
Testing
and
Calibration Laboratories”
Building orientation
Thermal bridges
The default is set at zero, and should only be
Copy of site plan of building with
changed with caution. Refer to Section 7.5.2 of
orientation
the iSBEM User Guide.
compass in relation to the building.
Where a non-default value is used,
acceptable documentary evidence
must be provided for the building.
For existing buildings, it is unlikely that
sufficient evidence will be obtainable to
substantiate the use of non-default thermal
bridging values.
Non-default thermal bridging values should be
used where possible for new buildings. The
Assessor is expected to show that reasonable
efforts were made to ascertain actual values
rather than opting for default values.
or
a
photograph
of
Where accredited data is selected,
documentary evidence must be
provided that demonstrates that
“Limiting Thermal Bridging and Air
Infiltration - Acceptable Construction
Details’’ (http://www.environ.ie) as
referenced in Building Regulations
2008 TGD L has been conformed to.
This requires that the relevant
drawings clearly show the relevant
details and that these details are
checked and signed off by the
developer/builder, site engineer or
architect.
Where calculated psi values are used,
documentary evidence in accordance
with the methods described in IS EN
ISO 10211 Parts 1 and 2 must be
provided. These calculations of two
20
NEAP Survey Guide
Version: 1.2
dimensional or three dimensional
heat flow require the use of numerical
modeling software. To be acceptable,
numerical modeling software should
model the validation examples in IS
EN ISO 10211 with results that agree
with the stated values of temperature
and heat flow within the tolerance
indicated in the standard for these
examples. Several packages are
available that meet this requirement.
Detailed guidance on decisions
regarding specific input to the
modeling
software
and
the
determination of certain quantities
from the output of the software is
contained in BRE Report BR 497
Conventions for calculating linear
transmittance
and
thermal
temperature factors. This guidance
should be followed in carrying out
modeling work so that different users
of the same software package and
users of different software packages
can obtain correct and consistent
results.
TGD L Section D2 requires that Ψ
values are calculated in accordance
with I.S. EN 10211. Certification of the
detail by a member of the NSAI
Thermal
Modellers’
Certification
Scheme is a means of meeting the
requirements in TGD L and NEAP for
calculation of Ψ values.
iSBEM Software Tab: “Geometry > Zones > General”
Data Entry Item
Guidance
Documentary Evidence
HVAC System
The use of default HVAC systems is detailed in
The evidence required in order to use
Appendix 4 and Appendix 7. The appendices
non-default building characteristics is
deal
met by one of the following in
specifically
with
the
following
circumstances:
conjunction
with
the
plantroom
-
Shell and Core Buildings
survey and ceiling void details:
-
No HVAC present in the building/ zone
•
Copy of as built HVAC drawings
and specifications;
For further detail on default HVAC systems
refer to 7.5.3 of the iSBEM User Guide.
•
Copy of technical details from
operational
manuals;
21
and
maintenance
NEAP Survey Guide
Version: 1.2
The BER is based on non default HVAC systems
•
where there is sufficient evidence available. As
Representative photographs of
the HVAC system.
outlined in Section 6 the Assessor is expected
to show that reasonable efforts were made to
ascertain non-default values rather than
opting for default values.
Building Type/
The activity specified sets default parameters
In combination with the floor by floor
Activity
which the tool uses to calculate the energy
sketches
consumption.
marked up to show zones the
These
parameters
include
/architectural
drawings
temperature set points, heat gains from people
following should be provided:
and equipment, required illuminance, and
•
Survey Form;
fresh air requirements amongst others.
•
Note on basis used to define
For details Refer to 7.5.3 of the iSBEM User
zones.
Guide.
Area
Floor area of zone.
Floor
by
floor
sketches
Refer to Section 3.4 Measurement and Other
dimensions and calculations
Conventions and Section 7.5.3 of the iSBEM
or
User Guide.
Architectural
drawings
with
with
dimensions and calculations marked
up to show zones.
Height
Height of zone
Building sketches with dimensions,
Refer to Section 3.4 Measurement and Other
calculations and Survey Form
Conventions and Section 7.5.3 of the iSBEM
or
User Guide.
Architectural
Refer to Appendix 6 of the NEAP Survey Guide
dimensions, calculations and Survey
for examples of zone height calculation.
Form.
Building
drawings
sketches/
with
architectural
drawings should show the depth of all
components, including floor slabs,
floor voids, ceiling voids etc.
Zone Infiltration
Use the air permeability default value of 25
Where a non-default value is used, a
m /h/m at 50 Pa unless a valid pressure test
copy of the pressure test certificate
certificate is available.
must be provided with the address of
3
2
the building being assessed and date
of the pressure test.
Pressure test certificates must be in
compliance with IS EN 13829:2000
“Thermal Performance of Buildings;
Determination of Air Permeability of
Buildings: Fan Pressurization Method”
and CIBSE Technical Manual TM23
“Testing Buildings for Air Leakage”.
Refer to
guidance
22
Building Infiltration for
on
individuals/
NEAP Survey Guide
Version: 1.2
organisations carrying out tests.
iSBEM Software Tab: “Geometry > Envelope”
Data Entry Item
Guidance
Documentary Evidence
Name
Refer to Section 3.6 Nomenclature in iSBEM
Not applicable.
User Guide for guidance.
Zone
Zone that envelope element is part of.
Floor
by
floor
sketches
with
dimensions and Survey Form
or
Architectural
drawings
with
dimensions and marked up to show
zones and Survey Form.
Type of Envelope
Choose between wall, floor/ceiling and roof.
Not applicable.
Construction
Choose from Constructions set up in Project
Floor
Database for envelope type.
dimensions and Survey Form and
by
floor
sketches
with
photographs
or
Architectural
drawings
with
dimensions and marked up to show
zones
and
Survey
Form
and
sketches
with
photographs.
Connects Space to
Choose what conditions apply to the other
Floor
side of the wall, floor/ceiling or roof.
dimensions and Survey Form
by
floor
Refer to Section 7.5.4 of iSBEM User Guide for
or
definitions.
Architectural
Refer to Appendix 8 for further guidance.
dimensions and marked up to show
drawings
with
zones and Survey Form.
Orientation
Select from one of the available options.
Copy of site plan or sketch of building
with orientation and photograph of
compass in relation to the building.
Area
Area of envelope inclusive of any windows/
Floor
doors.
dimensions, calculations and Survey
by
floor
Refer to Section 3.4 of iSBEM User Guide for
Form
measurement conventions.
or
Architectural
sketches
drawings
with
with
dimensions, calculations and marked
up to show zones and Survey Form.
Additional
Bridges
Thermal
For existing buildings, it is unlikely that
Where a non-default value is used,
sufficient evidence will be obtainable to
acceptable
substantiate the use of non-default thermal
must be provided for the building.
bridging psi values.
Refer to thermal bridging in section
Non-default thermal bridging values should be
iSBEM Software Tab: “Geometry >
used where possible for new buildings. The
Project”
Assessor is expected to show that reasonable
documentary evidence required.
23
documentary
for
evidence
guidance
on
NEAP Survey Guide
Version: 1.2
efforts were made to ascertain actual values
rather than opting for default values.
iSBEM Software Tab: “Geometry > Doors”
Data Entry Item
Guidance
Documentary Evidence
Name
Refer to Section 3.6 Nomenclature in iSBEM
Not applicable.
User Guide for guidance.
In Envelope
Envelope that Door is part of.
Floor
by
floor
sketches
with
dimensions and Survey Form
or
Architectural
drawings
with
dimensions and marked up to show
zones and Survey Form.
Type
Choose
between
High
Usage
Entrance,
Not applicable.
Personnel, and Vehicle Access Doors.
Construction
Choose from Constructions set up in Project
Floor by floor sketches with doors
Database for door type.
identified and Survey Form and
photographs
or
Architectural drawings with doors
identified and marked up to show
zones
and
Survey
Form
and
photographs.
Area
Area of structural opening in wall including
Building sketches with dimensions
frame.
and Survey Form
Refer to Section 3.4 of iSBEM User Guide for
or
measurement conventions.
Architectural
drawings
with
dimensions and Survey Form.
iSBEM Software Tab: “Geometry > Windows and Rooflights”
Data Entry Item
Guidance
Documentary Evidence
Name
Refer to Section 3.6 Nomenclature in iSBEM
Not applicable.
User Guide for guidance.
In Envelope
Envelope that window/rooflight is part of.
Floor
by
floor
sketches
with
dimensions and Survey Form
or
Architectural
drawings
with
dimensions and marked up to show
zones and Survey Form.
Glazing Type
Choose between the glazing types defined in
Floor by floor sketches with glazing
Project Database or default glazing.
type identified and Survey Form and
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NEAP Survey Guide
Version: 1.2
photographs
or
Architectural drawings with glazing
type identified and marked up to
show zones and Survey Form and
photographs.
Area
Area of structural opening in wall/roof
Building sketches with dimensions
including frame.
and Survey Form
Refer to Section 3.4 of iSBEM User Guide for
or
measurement conventions.
Architectural
drawings
with
dimensions and Survey Form.
Surface Area Ratio
This is the “developed area to projected area”
Building sketches with dimensions
ratio for the window or rooflight as defined in
and Survey Form
or
Section 7.5.5 of iSBEM User Guide.
Architectural
drawings
with
dimensions and Survey Form.
Display
Window
Tickbox
This is an area of glazing intended for the
display of products or services on offer within
the building, positioned:
• At external perimeter of the building; and
• At an access level and immediately
adjacent to a pedestrian thoroughfare.
Building sketches with dimensions
and Survey Form
or
Architectural
drawings
with
dimensions and Survey Form.
There should be no permanent workspace
within one glazing height of the perimeter.
Glazing more than 3m above such an access
level should not be considered part of the
display window except:
• Where the products on display require a
greater height of glazing;
• In cases of building work involving
changes to the façade and glazing
requiring planning consent, where
planners should have discretion to require
a greater height of glazing; eg to fit in with
surrounding buildings or to match the
character of the existing façade.
Area Ratio Covered
Shading System
This is the ratio of the roof area covered by an
Building sketches with dimensions
array of rooflights to the total area of the
and Survey Form
rooflight glazing.
or
Refer to Section 7.5.5 of iSBEM User Guide for
Architectural
definition.
dimensions and Survey Form.
Choose
from
User-moveable
external
drawings
with
Building sketches with dimensions
protection, Automatically-controlled external
and Survey Form and photographs
protection, or All other cases.
or
Refer to Section 7.5.5 of iSBEM User Guide for
Architectural
definition.
dimensions and Survey Form and
drawings
with
photographs.
Transmission Factor
This is the fraction of light transmitted through
Building sketches with dimensions
that specific window after accounting for
and Survey Form and photographs
shading from overhangs and fins.
or
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NEAP Survey Guide
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For details on how to calculate the
transmission factor, see Section 7.5.6:
Transmission Correction Factors of iSBEM User
Guide.
Architectural
drawings
with
dimensions and Survey Form and
photographs.
iSBEM Software Tab: “Building Services > Global and Defaults > Project Building Services”
Data Entry Item
Guidance
Documentary Evidence
Is the lighting
Answering “yes” to this input would require the The evidence required in order to
separately metered?
Assessor to obtain formal confirmation that the answer “Yes” is met by one of the
lighting is separately metered.
following
•
Copy
•
Letter from an electrical contractor
of
As
Built
electrical
schematics showing meters;
advising that he has checked the
system in the last 12 months and
confirming that it is separately
metered.
M&T with alarm for The Assessor must ascertain if such a system is The evidence required is details of M&T
“out of range” values?
installed and that it is functioning.
system
from
operational
and
maintenance manuals. Review the BMS
to ensure that the system is in
operation
or
review
records
for
previous 12 months.
Electricity Power Factor The default power factor value of <0.9 must be Electricity utility bills for 12 month
used in an existing building unless analysis of period prior to assessment of an
the recent 12 month’s bill data indicates a existing building.
different value.
The default power factor value of <0.9 must be For a new building, detail of installed
used in a new building unless:
power factor correction equipment or a
signed report from a suitably qualified
1) A power factor of >0.95 can be used in a electrical engineer.
new building where there is adequate
documentary evidence to support the
installation of power factor correction
equipment within the building for final
certificates and the proposed installation of
power factor correction equipment for
provisional certificates.
2) A non-default power factor can be used for
a Final BER in a new building where a
suitably qualified electrical engineer has
produced a report detailing the power
factor for the building as constructed.
3)
A non-default power factor can be used for
a Provisional BER in a new building where a
suitably qualified electrical engineer has
produced a report detailing the power
26
NEAP Survey Guide
Version: 1.2
factor for the building as per the design.
District Heating
The default value must be used if District For existing buildings, a report from the
Parameters
Heating is selected as the heat source and there district heating scheme operator,
is no documentary evidence to substantiate detailing how the CO 2 emission and
non-default entries.
primary energy factors for the district
heating have been derived.
A non-default value is used where possible. The The calculations should be based on
Assessor should ascertain the CO 2 emission actual fuel bills over a 1 year period.
factor and primary energy factor for district The CO 2 emission factors and primary
heating which should reflect the average annual energy factors for the fuel(s) used by
efficiency and fuel mix of the whole district the district heating system should be
heating system. It should include for all the taken from Table 2 of the iSBEM User
gross efficiencies of heat generating plants, Guide.
including any CHP generators, any waste heat
recovery or heat dumping, the effect of heat For new buildings, a report from a
losses in distribution (external to the building), suitably qualified member of the
the emissions from electricity used for pumping, design team, detailing how the CO 2
and
any
other
relevant
carbon
dioxide emission and primary energy factors for
emissions.
the district heating have been derived.
The calculations should be based on
predicted fuel consumption over a 1
year period. The CO 2 emission factors
and primary energy factors for the
fuel(s) used by the district heating
system should be taken from Table 2 of
the iSBEM User Guide.
iSBEM Software Tab: “Building Services > HVAC Systems > General”
Data Entry Item
Guidance
Documentary Evidence
Type
Select from the Building Services Type options In conjunction with the plantroom
in Database for Building Services. Follow survey details and ceiling void details
guidance in Section 7.6.2 of the iSBEM User the evidence required is met by one of
Guide.
the following:
Categorising the HVAC system is an important •
Photographs of air handling units,
aspect of BER production because such systems
ducting, associated equipment in
account for the major proportion of energy
ceiling
used in a building.
batteries,
The Assessor must be familiar with the various
discharge
types of HVAC system as categorised in Table 13
dampers, etc;
of the iSBEM User Guide.
•
voids,
heater/cooling
fresh
grilles,
air
intakes,
actuated
Copies of technical data sheets
The Assessor must be capable of categorising
from operational and maintenance
the system based on the limited information
manuals;
27
NEAP Survey Guide
Version: 1.2
•
available on site.
As
Built
drawings
and
specifications.
The basis for categorising a system
must be documented and retained
together with supporting information.
Heat Source
Select from the Heating Sources options in the In conjunction with the plantroom
database
survey details, the evidence required is
met by one of the following:
•
Photographs of heat source plant
(eg
boiler
nameplates
and
manufacturer name);
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Fuel Type
Select from the Fuel Types
In conjunction with the plantroom
survey details, the evidence required is
For further guidance on the selection of solid met by one of the following:
fuel types refer to Appendix 10.
•
Photographs of heat source plant
(eg
boiler
nameplates
and
manufacturer name);
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
built
drawings
and
specifications.
Tick if this system also The Assessor must ascertain if the heating In conjunction with the plantroom
uses CHP
system derives its heat, or part of it, from a survey details, the evidence required is
combined heat and power system. When this is met by one of the following:
ticked in iSBEM, a new tab opens, “CHP •
Photographs of CHP plant with
generator”.
nameplates
and
manufacturer
name;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
built
drawings
and
specifications.
Cooling System
Select from the Generator Types options in the In conjunction with the plantroom
Generator Type
database.
survey details, the evidence required is
met by one of the following:
•
Photographs of cooling plant (eg
chiller
nameplates
and
manufacturer name);
•
28
Copies of
technical data sheets
NEAP Survey Guide
Version: 1.2
from operational and maintenance
manuals;
•
As
built
drawings
and
specifications.
Ventilation Heat
The heat recovery system may be incorporated In conjunction with the plantroom
Recovery
within the air handling unit(s) or it may be survey details, the evidence required is
met by one of the following:
external.
The Assessor must establish whether or not heat •
Photographs of heat recovery unit;
recovery is fitted and to make reasonable efforts •
Copies of technical data sheets
to ascertain its seasonal efficiency.
from operational and maintenance
manuals
The default value must be used for efficiency if •
Sources of efficiency as outlined in
there
“Guidance” and Section 6.1;
is
no
documentary
evidence
to
substantiate non-default entries.
•
As
Built
specifications.
A non-default value should be used where
possible. Non-default efficiency values must be
in compliance with Section 10.5 of “NonDomestic Building Services Compliance Guide:
2010” published by CLG in the UK.
Non-default efficiencies may be obtained from
the following sources as per Section 6.1:
•
Performance data on “CE marked”
literature is acceptable provided that the
literature refers to the relevant test
performance standard.
•
Literature from manufacturer referencing
the efficiency and relevant test
performance standard.
•
Accredited Test certificates to the relevant
test performance standard
29
drawings
and
NEAP Survey Guide
Version: 1.2
iSBEM Software Tab: “Building Services > HVAC Systems > Heating”
Data Entry Item
Guidance
Does it qualify for Check
ECA/ACA?
the
Documentary Evidence
equipment
concerned
at Take note of the specific equipment
http://www.SEAI.ie/Your_Business/Accelerated_ make and model number and show
Capital_Allowance or http://www.eca.gov.uk/ .
corresponding
details
on
ACA
webpage (or ECA, the UK equivalent).
Include a snapshot of the relevant page
from the website. A web link to the
page is not acceptable. ECA allows the
user to receive an automated email
with the product listing. ACA can
generate an Excel file with the product
listing. Both of these are acceptable as
supporting evidence for this entry.
Do you know the
It is important to note that there is a difference In conjunction with the plantroom
effective heat
between the “as tested” efficiency of a boiler, survey details, the evidence required is
generating seasonal
the “gross seasonal” efficiency and the “Effective met by one of the following:
efficiency?
Heat
Generating
Seasonal
Efficiency”
as •
required in iSBEM.
Photographs of heat source plant
(eg
boiler
manufacturer
Non-default
efficiency
values
must
be
nameplates
and
name)
and
manufacturer’s data sheets;
calculated in compliance with “Non-Domestic •
Sources of efficiency as outlined in
Building Services Compliance Guide: 2010”
“Guidance” and Section 6.1;
published by CLG in the UK.
•
Copies of
technical data sheets
from operational and maintenance
Refer to Appendix 5 of this Survey Guide for
manuals;
examples of how the Compliance Guide is used. •
As
Built
drawings
and
specifications;
Heating efficiency credits are applied to the •
Copies of control specifications/
“Seasonal Boiler Efficiency” to arrive at the
schedules or historical data from
“Effective Heat Generating Seasonal Efficiency”
BMS demonstrating that the boiler
as called for in the iSBEM input screen. Refer to
is operating in condensing mode
the Non-Domestic Building Services Compliance
for 80% of the annual operating
Guide: 2010 to determine if credits apply to the
hours.
efficiency of the system as installed in the
building being assessed.
Non-default efficiencies may be obtained from
the following sources as per Section 6.1:
•
Performance data on “CE marked”
literature is acceptable provided that the
literature refers to the relevant test
performance standard.
•
Literature from manufacturer referencing
30
NEAP Survey Guide
Version: 1.2
iSBEM Software Tab: “Building Services > HVAC Systems > Heating”
Data Entry Item
Guidance
Documentary Evidence
the efficiency and relevant test
performance standard.
•
Accredited Test certificates to the relevant
test performance standard
•
ECA/ ACA websites, where technology has
been tested to the relevant test
performance standard.
The Assessor should use default values only if it
is not possible to obtain the heating source
efficiency data required and should have
evidence
to
correspondence
substantiate
this,
from
heating
such
as
source
manufacturer stating that efficiency is not
available.
Do you know the
For radiant heaters the Heat Generator Seasonal In conjunction with the plantroom
generator radiant
Efficiency is equivalent to its thermal efficiency survey details, the evidence required is
efficiency?
(gross calorific value basis). For flued appliances met by one of the following:
the thermal efficiency of the radiant heater will •
Photographs
be stated by the manufacturer of the radiant
plant(eg boiler nameplates and
heater having been measured according to the
manufacturer
test standards EN 1020 or EN 13842 as
manufacturer’s data sheets;
applicable. The procedures in EN 1020 and EN •
Sources of efficiency as outlined in
13842 yield a net efficiency - this must be
Section 6.1;
converted to a gross efficiency.
•
of
heat
name)
source
and
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Tick if this HVAC
The Assessor must examine the circulating In conjunction with the plantroom
system uses variable
pumps to determine if they are variable speed survey details, the evidence required is
speed pumps.
type. Manufacturer’s data sheets should assist in met by one of the following:
•
this regard.
Photographs
of
pumps
and
manufacturer’s data sheets;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Tick if this system also Refer to previous section “Building Services > Refer to previous section “Building
31
NEAP Survey Guide
Version: 1.2
iSBEM Software Tab: “Building Services > HVAC Systems > Heating”
Data Entry Item
Guidance
Documentary Evidence
uses CHP
HVAC Systems > General”
Services > HVAC Systems > General”
iSBEM Software Tab: “Building Services > HVAC Systems > Cooling”
Data Entry Item
Guidance
Documentary Evidence
Generator kW
Select the cooling generator nominal electrical
In conjunction with the plantroom
power.
survey details, the evidence required is
met by one of the following:
•
Photographs of cooling plant (eg
chiller
nameplates
manufacturer
name)
and
and
manufacturer’s data sheet;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Fuel Type
Select from the Fuel Types
In conjunction with the plantroom
survey details, the evidence required is
met by one of the following:
•
Photographs of cooling plant (eg
chiller
nameplates
manufacturer
name)
and
and
manufacturer’s data sheet;
•
Copies
of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Does it qualify for ACA Check
or ECA?
the
equipment
concerned
at Take note of the equipment and details
http://www.SEAI.ie/Your_Business/Accelerated_ on ACA/ECA webpage as outlined
Capital_Allowance or http://www.eca.gov.uk.
Do
you
generator
know
the Non-default
efficiency
values
must
above.
be In conjunction with the plantroom
seasonal calculated in compliance with “Non-Domestic survey details, the evidence required is
energy efficiency ratio Building Services Compliance Guide: 2010” met by one of the following:
(SEER)?
published by CLG in the UK.
•
Photographs of cooling plant (eg
Refer to Appendix 5 of this Survey Guide for
chiller
nameplates
examples of how the Compliance Guide is used.
manufacturer
name)
manufacturer’s data sheet;
32
and
and
NEAP Survey Guide
Version: 1.2
Non-default efficiencies may be obtained from •
Sources of efficiency as outlined in
the following sources:
“Guidance” and Section 6.1;
•
•
Performance data on “CE marked”
literature is acceptable provided that the
literature refers to the relevant test
performance standard.
•
Literature from manufacturer referencing
the efficiency and relevant test
performance standard.
•
Accredited Test certificates to the relevant
test performance standard.
•
ECA/ ACA websites, where technology has
been tested to the relevant test
performance standard.
•
Eurovent website, where technology has
been tested to the relevant test
performance standard.
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
The Assessor should use default values only if
it is not possible to obtain the cooling plant
efficiency data required and should have
evidence
to
substantiate
this,
such
as
correspondence from chiller manufacturer
stating that efficiency is not available.
Do
you
generator
know
the The methodology for the calculation of the EER In conjunction with the plantroom
nominal is detailed in the “Non-Domestic Building survey details, the evidence required is
energy efficiency ratio Services Compliance Guide: 2010” published by met by one of the following:
(EER)?
•
CLG in the UK.
Photographs of cooling plant (eg
Please note that in this guide the term “Energy
chiller
Efficiency Ratio (EER)” has the same meaning
manufacturer
as the “Nominal Energy Efficiency Ratio (EER)”
manufacturer’s data sheet;
•
used in iSBEM.
Non-default efficiencies may be obtained from
•
name)
and
and
Sources of efficiency as outlined in
“Guidance” and Section 6.1;
•
the following sources:
nameplates
Copies of technical data sheets
from operational and maintenance
Performance data on “CE marked”
literature is acceptable provided that the
literature refers to the relevant test
performance standard.
•
Literature from manufacturer referencing
the efficiency and relevant test
performance standard.
•
Accredited Test certificates to the relevant
test performance standard.
33
manuals;
•
As
Built
specifications.
drawings
and
NEAP Survey Guide
Version: 1.2
•
ECA/ ACA websites, where technology has
been tested to the relevant test
performance standard.
•
Eurovent website, where technology has
been tested to the relevant test
performance standard.
The Assessor should use default values only if
it is not possible to obtain the cooling plant
efficiency data required and should have
evidence
to
substantiate
this,
such
as
correspondence from chiller manufacturer
stating that efficiency is not available.
iSBEM Software Tab: “Building Services > HVAC Systems > System Adjustment”
Data Entry Item
Has
the
Guidance
Documentary Evidence
ductwork Answering “yes” to this input would require
been leakage tested?
the Assessor to obtain formal confirmation
Copy of Test Certificates, test must be
carried out to CEN standards.
from Building Owner that leakage test has
been carried out.
Does the AHU meet
Answering “yes” to this input would require
Copy of Test Certificates, test must be
CEN leakage
the Assessor to obtain formal confirmation
carried out to CEN standards.
standards?
from Building Owner that leakage test has
been carried out.
Do
you
specific
(SFP)?
know
fan
the There is an onus on the Assessor to make
power reasonable efforts to find and use the fan
details and to resort to the default value only if
The evidence required is met by one
of the following:
•
the information is not available.
Photographs of fan nameplates
and manufacturer’s data sheets;
•
Sources of efficiency as outlined in
The methodology for the calculation of the SFP
“Guidance” and Section 6.1;
is detailed in the “Non-Domestic Building •
Copies of technical data sheets
Services Compliance Guide: 2010” published by
from operational and maintenance
CLG in the UK.
manuals;
Non-default efficiencies may be obtained from •
As
the following sources:
specifications.
Built
drawings
and
Calculations of SFP must be retained
•
Performance data on “CE marked”
literature is acceptable provided that the
literature refers to the relevant test
performance standard.
•
Literature from manufacturer referencing
the efficiency and relevant test
performance standard.
•
Accredited Test certificates to the relevant
test performance standard.
34
as evidence.
NEAP Survey Guide
Version: 1.2
Auxiliary energy for
There is an onus on the Assessor to make
The evidence required is met by one
fanned warm air
reasonable efforts to find and use the auxiliary
of the following:
heaters
energy details and to resort to the default
•
value only if the information is not available.
Photographs of warm air heaters
nameplates and manufacturer’s
data sheets;
•
Copies of technical data sheets
from
operational
and
maintenance manuals;
•
As
Built
drawings
and
specifications.
iSBEM Software Tab: “Building Services > HVAC Systems > Metering Provision”
Data Entry Item
Guidance
Documentary Evidence
Is this HVAC System Answering “yes” to this input would require the The evidence required in order to
separately
sub- Assessor to obtain formal confirmation that the answer “Yes” is met by one of the
metered?
HVAC is separately metered.
following
•
Copy
•
Letter from an electrical contractor
of
As
Built
electrical
schematics showing meters;
advising that he has checked the
system in the last 12 months and
confirming that it is separately
metered.
M&T with alarm for The Assessor should ascertain if such a system is The evidence required is details of M&T
“out of range” values?
installed and that it is functioning
system
from
operational
and
maintenance manuals. Review the BMS
to ensure that the system is in
operation and/or review records for
previous 12 months
iSBEM Software Tab: “Building Services > HWS”
Data Entry Item
Guidance
Documentary Evidence
Generator Type
Select from the Generator Types.
In conjunction with the plantroom
survey details, the evidence required is
In the case of multiple tenants/premises in a met by one of the following:
building:
•
• Where the hot water services are supplied
to each tenant by a central water heating
35
Photographs of HWS plant (eg
boiler
nameplates
and
NEAP Survey Guide
Version: 1.2
•
system, (e.g. from the landlord to the
tenant’s premises) the efficiency and
•
storage volume should be based on the
details of that central system. Where this
information is not available default data
must be used.
•
Where the hot water services are part of the
tenant’s system, the efficiency and storage
volume should be based on the details of
the tenant’s services. Where this
information is not available default data
must be used.
manufacturer name);
Copies of technical data sheets
from operational and maintenance
manuals;
As
Built
drawings
and
specifications.
In the case where more than one HWS serves a
building, the HWS system that is assigned to a
zone is the HWS system that accounts for the
majority of the HWS demand in that zone.
To identify the system that serves the majority
of the HWS demand, determine what each
system serves and the associated hot water
demand for each system.
Apply NEAP Survey Guide Section A4.4 when
there is no hot water system present in the
building.
Tick if the generator is Answering “yes” to this input would require the The evidence required is met by one
later than 1998
Assessor to obtain documentary evidence to of the following:
substantiate date of construction of the •
Refer to documentary evidence
building or date of any remedial work carried
from Age of Building;
•
out.
Copies of technical data sheets
from operational and maintenance
manuals;
•
Photographs
nameplates
of
HWS
showing
plant
year
of
manufacture;
•
As
Built
drawings
and
specifications.
Fuel Type
Select from the Fuel Types
In conjunction with the plantroom
survey details, the evidence required is
For further guidance on the selection of solid met by one of the following:
fuel types refer to Appendix 10.
•
Photographs of HWS plant (eg
boiler
nameplates
manufacturer
name)
and
and
manufacturer’s data sheet;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
36
As
Built
drawings
and
NEAP Survey Guide
Version: 1.2
specifications.
Do you know the
Non-default
effective heat
calculated in compliance with “Non-Domestic survey details, the evidence required is
efficiency
values
must
be In conjunction with the plantroom
generating seasonal
Building Services Compliance Guide: 2010” met by one of the following:
efficiency?
published
by CLG in the UK including •
calculation of heating efficiency credits.
Photographs
boiler
of HWS
plant(eg
nameplates
and
manufacturer
name)
and
Default values should only be used if it is not
manufacturer’s data sheet;
possible to obtain the HWS plant efficiency data •
Sources of efficiency as outlined in
required with evidence to substantiate this,
“Guidance” and Section 6.1;
such as correspondence from manufacturer •
Copies of technical data sheets
stating that efficiency is not available.
from operational and maintenance
manuals;
Non-default efficiencies may be obtained from •
As
the following sources:
specifications.
•
Performance data on “CE marked”
literature is acceptable provided that the
literature refers to the relevant test
performance standard.
•
Literature from manufacturer referencing
the efficiency and relevant test
performance standard.
•
Accredited Test certificates to the relevant
standard.
•
ECA/ ACA websites, where technology has
been tested to the relevant test
performance standard.
Built
drawings
and
Is the system a storage The Assessor must ascertain if the HWS system In conjunction with the plantroom
system
has a storage system. If SES (Solar Energy survey details, the evidence required is
System) is applied to the Hot Water System it is met by one of the following:
assumed that hot water storage exists.
•
Photographs of HWS Cylinder and
nameplates
and
manufacturer
name; and manufacturer’s data
sheet;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Storage Volume/
The storage volume, insulation type and In conjunction with the plantroom
Storage Losses
thickness are entered if the storage losses in survey details, the evidence required is
MJ/month are unknown.
met by one of the following:
If no value is entered, iSBEM uses default values. •
Photographs of HWS Cylinder and
Where storage volume is not available from
nameplates
37
and
manufacturer
NEAP Survey Guide
Version: 1.2
other sources, and storage is accessible,
name and manufacturer’s data
estimate storage volume by measuring the
sheet;
•
dimensions of the storage vessel.
Copies of technical data sheets
Refer to Appendix 9 of this Survey Guide for
from operational and maintenance
guidance on determining the storage volume of
manuals;
•
the storage unit.
The Assessor should use default values only if it
As
Built
drawings
and
specifications.
is not possible to obtain the HWS plant data or Hot water storage volume measured on
measure volume on site, and should have site (and evidence of any calculations
evidence to substantiate this.
retained by the Assessor)
Where storage insulation details are not
available from other sources, and insulation is
accessible,
estimate
insulation
depth
by
measuring its thickness (e.g. using a pin).
Default
hot
water
cylinder
insulation
thicknesses in Appendix A4.4 are used if
insulation is inaccessible.
Does the System have
The Assessor must ascertain if the HWS system In conjunction with the plantroom
Secondary Circulation
has secondary circulation.
survey details, the evidence required is
met by one of the following:
•
Photographs
of
secondary
pipework;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Circulation Losses/
If no value is entered, iSBEM uses default values In conjunction with the plantroom
Pump Power/ Loop
survey details, the evidence required is
Length
The Assessor should use default values only if it met by one of the following:
is not possible to obtain the HWS plant details •
Photographs of HWS pumps and
and should have evidence to substantiate this.
nameplates
and
manufacturer
name and manufacturer’s data
sheet;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Tick if there is Time
The Assessor must ascertain if the HWS system In conjunction with the plantroom
Control on Secondary
has time control on secondary circulation.
Circulation
survey details, the evidence required is
met by one of the following:
•
Photographs of secondary time
controls;
38
NEAP Survey Guide
Version: 1.2
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
iSBEM Software Tab: “Building Services > SES”
Data Entry Item
Guidance
Documentary Evidence
In HWS
Select from the HWS that the Solar Hot Water In conjunction with the external survey
Heating Applies.
details, the evidence required is met by
one of the following:
•
Copies of technical data sheets
from operational and Maintenance
Manuals;
•
As
Built
drawings
and
specifications.
Area
Enter the aperture area of the solar collectors
The evidence required is met by one of
the following:
•
Copies of technical data sheets
measured in accordance with EN
12975 or data from the HARP
database;
•
Sources of efficiency as outlined in
•
External survey data on Survey
Section 6.1;
Form
with
dimensions
and
orientation and photographs of
solar collectors;
•
As
Built
drawings
and
specifications.
Orientation
Select from the available options
The evidence required is met by one of
the following:
•
External survey data on Survey
Form
with
dimensions
and
orientation and photographs of
solar collectors. Use a directional
compass;
•
As
Built
drawings
and
specifications.
Inclination
Select from list of angles between 0O to 90O.
The evidence required is met by one of
0 tilt represents a horizontal surface
the following:
90 O tilt represents a vertical surface
•
O
External survey data on Survey
Form
39
with
dimensions
and
NEAP Survey Guide
Version: 1.2
inclination and photographs of
solar collectors;
•
As
Built
drawings
and
specifications.
Do
you
know
the The default values are used based on the The evidence required is met by one of
collector performance collector selected if it is not possible to obtain the following:
parameters from EN the performance parameters for the collector.
•
12975-2
Photographs of solar collectors
with
nameplate
manufacturer’s
data
and
sheets
measured to EN 12975-2 by a body
with relevant accreditation or data
from the HARP database;
•
Sources of efficiency as outlined in
•
Copies of technical data sheets
Section 6.1;
from Operational and Maintenance
Manual measured to EN 12975-2
by
a
body
with
relevant
accreditation;
•
As
Built
drawings
and
specifications.
Solar Storage
The dedicated solar storage volume associated In conjunction with the plantroom
with the solar panel, insulation type and survey details, the evidence required is
met by one of the following:
thickness are entered.
Appendix 9 of this Survey Guide provides •
Photographs of HWS Cylinders and
guidance on determining the storage volume of
nameplates
storage units, while Section 7.6.4 of iSBEM User
name and manufacturer’s data
Guide gives criteria for determining the
sheet;
and
manufacturer
dedicated solar storage volume for various •
Copies of technical data sheets
arrangements.
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
•
Hot
water
storage
volume
measured on site (and evidence of
any calculations retained by the
Assessor)
Do you know the heat Enter “There is no heat exchanger” if the system
transfer rate of the is a direct system.
Enter “No, use the default” if there is a heat
heat exchanger in the
exchanger and it is not possible to obtain the
collector loop?
performance data for the heat exchanger.
Enter “Yes, value is...” if the value is known.
Refer to Section 7.6.4 of iSBEM User Guide for
guidance.
40
In conjunction with the plantroom
survey details, the evidence required is
met by one of the following:
•
Photographs of HWS Cylinders and
nameplates
and
manufacturer
name and manufacturer’s data
sheet;
•
Copies of technical data sheets
NEAP Survey Guide
Version: 1.2
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
the Enter “No, use the default” if it is not possible to
overall
heat
loss obtain the performance data for the pipework
in the collector loop.
coefficient of all pipes
Enter “Yes, value is” if the value is known.
in the collector loop?
Refer to Section 7.6.4 of iSBEM User Guide for
guidance.
Do
you
know
In conjunction with the plantroom
survey details, the evidence required is
met by one of the following along with
provision
of
representative
photographs of the pipework:
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Are the distribution This only becomes active if there is a separate In conjunction with the plantroom
solar cylinder to the HWS cylinder.
pipes between the SES
survey details, the evidence required is
and
the
met by one of the following:
back-up
system insulated?
•
Photographs of pipework;
•
As
Built
drawings
and
specifications.
Auxiliary
Consumption
Energy Select from the circulation systems listed in the In conjunction with the plantroom
database.
survey details, the evidence required is
met by one of the following:
•
Photographs
of
nameplates
and
pumps
and
manufacturer
name and manufacturer’s data
sheet;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
iSBEM Software Tab: “Building Services > PVS”
Data Entry Item
Guidance
Documentary Evidence
Type
Select from the list of PV types.
In conjunction with the plantroom
survey details, the evidence required is
met by one of the following:
•
Photographs of PV panels and
nameplates
and
manufacturer
name and manufacturer’s data
sheet;
•
41
Copies of technical data sheets
NEAP Survey Guide
Version: 1.2
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Area
Enter the Area of the PV
The evidence required is met by one of
the following:
•
Photographs of Photovoltaics and
copies of technical data sheets
from manufacturer;
•
Photographs of Photovoltaics and
External survey data on Survey
Form
with
dimensions
and
drawings
and
orientation;
•
As
Built
specifications.
Orientation
Select from one of the available options
The evidence required is met by one of
the following:
•
External survey data on Survey
Form
with
dimensions
and
orientation with photographs of
PV. Use a directional compass;
•
As
Built
drawings
and
specifications.
Inclination
Select from list of angles between 0O to 90O.
The evidence required is met by one of
0 tilt represents a horizontal surface
the following:
90 O tilt represents a vertical surface
•
O
External survey data on Survey
Form
with
dimensions
and
inclination and photographs of
PVs;
•
As
Built
drawings
and
specifications.
iSBEM Software Tab: “Building Services > Wind Generators”
Data Entry Item
Guidance
Documentary Evidence
Terrain Type
Select from the list of Terrain types.
In conjunction with the external survey
details, the evidence required is met by
one of the following:
•
Photographs of surrounding sites;
•
Site plan showing surrounding
sites.
42
NEAP Survey Guide
Horizontal
Axis
Version: 1.2
- Enter the Diameter of the Wind Turbine
Diameter
The evidence required is met by one of
the following:
•
Copies of technical data sheets
from manufacturer;
•
External survey data on Survey
Form
with
dimensions
and
photographs of wind turbines;
•
As
Built
drawings
and
specifications.
Others - Area
Enter the Area Swept by the rotor blades. Refer The evidence required is met by one of
to Section 7.6.6 of the iSBEM Manual for details
the following:
•
Copies of technical data sheets
from manufacturer;
•
External survey data on Survey
Form
with
dimensions
and
photographs of wind turbines;
•
As
Built
drawings
and
specifications.
Height
Enter the height by the wind turbine. Refer to The evidence required is met by one of
Section 7.6.6 of the iSBEM Manual for details.
the following:
•
Copies of technical data sheets
from manufacturer;
•
External survey data on Survey
Form
with
dimensions
and
photographs of wind turbines;
•
As
Built
drawings
and
specifications.
kW
Enter the wind turbine rated power
The evidence required is met by one of
the following:
•
Copies of technical data sheets
from
manufacturer
and
photographs of wind turbines
nameplate;
•
As
Built
drawings
and
specifications.
iSBEM Software Tab: “Building Services > CHP generator”
Data Entry Item
Guidance
Documentary Evidence
Fuel Type
Select from the Fuel Types
In conjunction with the plantroom
survey details, the evidence required is
met by one of the following:
•
Photographs of CHP nameplates
and
43
manufacturer
name
and
NEAP Survey Guide
Version: 1.2
manufacturer’s data sheets;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Heat Efficiency
Seasonal
thermal
efficiency
of
the
CHP In conjunction with the plantroom
generator, defined as the total annual useful survey details, the evidence required is
heat supplied by the generator divided by the met by one of the following:
total annual fuel energy input to the generator •
Photographs of CHP nameplates
(using the gross calorific value).
and
manufacturer
manufacturer’s
compliance
name
data
with
sheets
the
and
in
national
standards or the CHP EU directive
or EN 15316-4-4;
•
Sources of efficiency as outlined in
Section 6.1;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Electrical Efficiency
Total annual electric power output by the CHP In conjunction with the plantroom
divided by the total annual fuel energy input survey details, the evidence required is
(using the gross calorific value).
met by one of the following:
•
Photographs of CHP nameplates
and
manufacturer
manufacturer’s
compliance
name
data
with
sheets
the
and
in
national
standards or the CHP EU directive
or EN 15316-4-4;
•
Sources of efficiency as outlined in
•
Copies of technical data sheets
Section 6.1;
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Building Space Heat Ascertain the proportion of space heating For existing buildings a report from the
Supplied
supplied to the building by the CHP plant.
Building
Operator
detailing
the
proportion of space heating supplied
to the building by the CHP plant.
Where submetering of the heat is
unavailable, the report should be based
on actual fuel consumption converted
44
NEAP Survey Guide
Version: 1.2
into heat consumption based on the
actual plant performances for a 12
month period.
For new buildings, a report signed by
engineers from the Design Team,
detailing the predicted proportion of
space heating supplied by the CHP
plant.
Building
Hot
Water Ascertain the proportion of hot water heating For existing buildings, a report from the
Supplied
supplied to the building by the CHP plant.
Building
Operator
detailing
the
proportion of hot water supplied to the
building by the CHP plant.
Where submetering of the hot water is
unavailable, the report should be based
on actual fuel consumption converted
into hot water consumption based on
the actual plant performances for a 12
month period.
For new buildings, a report signed by
engineers from the Design Team,
detailing the predicted proportion of
hot water supplied by the CHP plant.
Tick this box for
Ascertain if the building has a Trigeneration In conjunction with the plantroom
Trigeneration systems
system.
survey details, the evidence required is
met by one of the following:
•
Photographs of CHP nameplates
and
manufacturer
name
and
photographs of cooling System
(absorption chiller nameplate);
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Building Cooling
The Assessor must ascertain the proportion of For existing buildings, a report from the
Supplied
cooling supplied to the building by the Building
Trigeneration system
Operator
detailing
the
proportion of cooling supplied to the
building by the Trigeneration.
Where submetering of the chilled water
is unavailable, the report should be
based on running time for the plant
over a 12 month period and the actual
plant performances.
For new buildings, a report signed by
45
NEAP Survey Guide
Version: 1.2
engineers from the Design Team,
detailing the predicted proportion of
space cooling supplied by the CHP.
Chiller Efficiency
The seasonal chiller efficiency of the generator, In conjunction with the plantroom
defined as the cooling demand divided by the survey details, the evidence required is
met by one of the following:
cooling energy for the generator.
•
Photographs of CHP nameplates
and
manufacturer
name
and
photographs of cooling System
(absorption chiller nameplate) and
manufacturer’s data sheets;
•
Copies of technical data sheets
from operational and maintenance
manuals;
•
Sources of efficiency as outlined in
Section 6.1;
•
As
Built
drawings
and
specifications.
iSBEM Software Tab: “Building Services > Zones > HVAC, HWS & Lighting Systems”
Data Entry Item
Guidance
Documentary Evidence
Deadleg Length in this Length of draw off pipe to the outlet in the
zone
The evidence required is met by one of
space (only used in zones where the water is
the following:
drawn off).
•
The deadleg distance is measured from the
edge of the zone or from the storage vessel/
As
Built
mechanical
drawings
marked up to show zones;
•
circulation in the zone to the outlet point.
Sketches
of
zones/
pipework
showing dimensions.
•
Photographs of pipework.
Where pipework is not visible in the zone and
drawings are unavailable, allow for the
deadleg running from the edge of the zone or
from the storage vessel/ circulation in the
zone to the outlet point.
iSBEM Software Tab: “Building Services > Zones > Ventilation”
Data Entry Item
Guidance
Documentary Evidence
Zonal Ventilation Type If not previously included in the HVAC system,
the
Assessor
may
select
46
“Natural”
or
In conjunction with the floor by floor
sketches, the evidence required is met
NEAP Survey Guide
Version: 1.2
“Mechanical Supply/Extract” to a zone.
by one of the following:
•
As
Built
mechanical
drawings
marked up to show zones;
•
Do
you
know
the There is an onus on the Assessor to make
Supply/ Extract SFP?
Survey Form and photographs.
The evidence required is met by one
reasonable efforts to find and use the fan
of the following:
details and to resort to the default value only if
•
Photographs of fan nameplates
the information is not available.
and manufacturer’s data sheets;
Non-default values must be in compliance with •
Sources of efficiency as outlined in
the
“Non-Domestic
Building
Services
Section 6.1;
Compliance Guide: 2010” published by CLG in •
Copies of technical data sheets
the UK.
from operational and maintenance
manuals;
•
As Built drawings and
specifications.
Calculations of SFP must be retained
in all cases.
Does activity require
The Assessor must ascertain if high pressure
If non-default values are used the
high pressure drop air
drop air treatment is required or alternatively
Assessor must obtain drawings and
treatment
use the default based on selected activity.
specification showing high pressure
drop air treatment.
Ventilation Heat
The
be
In conjunction with the plantroom
Recovery
incorporated within the air handling unit(s) or
heat
recovery
system
may
survey details, the evidence required is
it may be external.
met by one of the following:
•
Photographs of heat recovery
The Assessor must establish whether or not
unit and manufacturer’s data
heat recovery is fitted and to make reasonable
sheets;
efforts to ascertain its seasonal efficiency.
•
Sources of efficiency as outlined in
Section 6.1;
The default value should be used for efficiency
•
Copies of technical data sheets
if there is no documentary evidence to
from
substantiate non-default entries.
maintenance manuals;
•
A non-default value should be used where
As
operational
Built
drawings
specifications.
possible.
Non-default values should be in compliance
with Section 10.5 of “Non-Domestic Building
Services Compliance Guide: 2010” published by
CLG in the UK
iSBEM Software Tab: “Building Services > Zones > Exhaust”
Data Entry Item
Guidance
Documentary Evidence
47
and
and
NEAP Survey Guide
Version: 1.2
Is there local
The Assessor must ascertain if there is
In conjunction with the floor by floor
mechanical exhaust in
mechanical exhaust from a zone
sketches, the evidence required is met
the zone
by one of the following:
•
As
Built
mechanical
drawings
marked up to show zones;
•
Survey Form and photographs.
Local Mechanical
The Assessor must determine the l/s/m2 floor
In conjunction with the floor by floor
Exhaust
area.
sketches, the evidence required is met
Default values can be obtained from CIBSE
by one of the following:
Guide F Part A.
•
As
Built
mechanical
drawings
marked up to show zones;
•
Photos of fan nameplates showing
Model number and Flow rate;
•
Do
you
know
the Assessors must make reasonable efforts to
Supply/ Extract SFP?
Survey Form and photographs.
The evidence required is met by one
find and use the fan details and to resort to
of the following:
the default value only if the information is not
•
Photographs of fan nameplates
available.
and manufacturer’s data sheets;
Non-default values should be in compliance •
Sources of efficiency as outlined in
with Section 10.5 of “Non-Domestic Building
Section 6.1;
Services Compliance Guide: 2010” published by •
Copies of technical data sheets
CLG in the UK
from operational and maintenance
manuals;
•
As
Built
drawings
and
specifications.
Calculations of SFP must be retained
in all cases.
iSBEM Software Tab: “Building Services > Zones > Lighting”
Data Entry Item
Guidance
Documentary Evidence
What information is
The default value of lighting parameters not In order to use the Full Lighting
available on Lighting
available
is
selected
when
there
is
no Design Carried Out entry the Assessor
documentary evidence to substantiate the Full must have a signed statement from a
Lighting Design Carried out entry.
partner/director of the consultants
(normally
the
M&E
engineers)
responsible for the lighting design
showing the installed power and
design illuminance for each of the
zones.
Lighting Parameters
Determine the lamp type for each zone.
not available
Where the specific fitting cannot be identified,
sketches, the evidence required is met
take the most conservative (highest power
by one of the following:
density) option from Table 15 of the iSBEM
•
48
In conjunction with the floor by floor
As
Built
Electrical
Lighting
NEAP Survey Guide
Version: 1.2
User Guide.
Drawings marked up to show
zones;
Refer to Appendix 11 for guidance on
•
Survey Form and photographs of
light fittings. Photograph(s) of each
selection of lamp type.
light type should be provided.
Refer to Appendix 4 for the details on how Shell
and Core buildings are dealt with.
Where LED lighting is present and Lighting
Parameters are not available, refer to section
A4.10 of the NEAP Survey Guide.
Where a combination of lighting systems is
present in the zone providing general lighting
(no display lighting), the zone should be split to
reflect the lamp locations.
Where a combination of lighting systems is
present in the zone providing general lighting
(no display lighting) across the entire zone, such
that splitting the zone to reflect the lamps
location is not practicable (For example the
zone contains a combination of fluorescents
and down lighters mixed throughout the zone)
then the following method is used:
•
The proportion of the zone’s area lit by each
lamp type is established.
•
The zone is split into a number of zones to
match the number of lamp types and for
each lamp type the relevant proportion of
the zone area and all of the zone’s
envelopes, including glazing should be
entered into each relevant zone along with
the appropriate respective lamp type.
Are
air
extracting The Assessor must determine if air extracting
luminaires fitted
luminaires are fitted.
In conjunction with the floor by floor
sketches, the evidence required is met
by one of the following:
•
As
Built
Electrical
Lighting
Drawings marked up to show
zones;
•
Survey Form and photographs of
light fittings.
iSBEM Software Tab: “Building Services > Zones > Lighting Controls”
49
NEAP Survey Guide
Version: 1.2
Data Entry Item
Guidance
Documentary Evidence
Lighting Controls
The Assessor must determine the lighting In conjunction with the floor by floor
controls within the zone.
sketches, the evidence required is met
by one of the following:
•
As
Built
Electrical
Lighting
Drawings marked up to show
zones;
•
Survey Form and photographs of
lighting controls.
Local Manual
Determine
if occupants
can control
the In conjunction with the floor by floor
Switching
luminaries individually and if light switch is sketches, the evidence required is met
within 6m of the luminaries it controls.
by one of the following:
•
As
Built
Electrical
Lighting
Drawings marked up to show
zones;
•
Survey Form and photographs of
lighting switches.
Photoelectric Options
Determine the type of switching, whether a
In conjunction with the floor by floor
different sensor controls the back of the zone,
sketches, the evidence required is met
the type of sensor and the Parasitic Power of
by one of the following:
the sensor.
•
Refer to Section 7.6.8 of the iSBEM User Guide.
and specification marked up to
Establish whether or not the sensor has a
photoelectric function, by carrying out on site
show zones;
•
tests or obtaining technical data sheets
detailing the light control functions in each
As Built electrical lighting drawings
Survey Form and photographs of
lighting controls;
•
zone.
Technical data sheets on the
lighting controls from Operational
and Maintenance manuals.
Occupancy Sensing
Determine the type of Occupancy Sensing
In conjunction with the floor by floor
Controls and the Parasitic Power of the sensor
sketches, the evidence required is met
Refer to Section 7.6.8 of the iSBEM User Guide
by one of the following:
•
As Built electrical lighting drawings
and specification marked up to
show zones;
•
Survey Form and photographs of
lighting controls;
•
Technical data sheets on the
lighting controls from Operational
and Maintenance manuals.
iSBEM Software Tab: “Building Services > Zones > Display Lighting”
50
NEAP Survey Guide
Version: 1.2
Data Entry Item
Guidance
Documentary Evidence
Refer to Section 7.6.8
This is the lighting intended to highlight
displays of exhibits or merchandise, or lighting
used in spaces for public leisure and
entertainment such as dance halls, auditoria,
conference halls, restaurants and cinemas.
In conjunction with the floor by floor
of the iSBEM User
Guide
sketches, the evidence required is met
by one of the following:
•
Refer to Section A4.11 Display Lighting where
zones incorporate an activity where SBEM
automatically assumes the presence of display •
lighting but none is actually present.
•
As Built electrical lighting drawings
and specification marked up to
show zones;
Survey Form and photographs of
lighting controls;
Technical data sheets on the
lighting
operational
manuals.
51
controls
and
from
the
maintenance
NEAP Survey Guide
Version: 1.2
Appendix 1: The NEAP Survey Form
52
NEAP Survey Guide
Version: 1.2
53
NEAP Survey Guide
Version: 1.2
54
NEAP Survey Guide
Version: 1.2
55
NEAP Survey Guide
Version: 1.2
56
NEAP Survey Guide
Version: 1.2
57
NEAP Survey Guide
Version: 1.2
Appendix 2: Zoning Example
Assessors must adhere to the zoning convention as set out in section 3.3 of the iSBEM User Guide which may
help reduce the amount of time and measurement required.
The following is an example office building:
Zoning the building by using the convention set out in the iSBEM user guide can help reduce the number of
measurements that need to be taken. The office building can be zoned as follows:
58
NEAP Survey Guide
Version: 1.2
It is important to note that internal envelopes between merged zones with thermal mass must be included
within the model. The km values determine how the building retains and emits heat, and hence they must be
defined in iSBEM. You can sum the areas of two or more internal walls (between merged zones) with the same
construction, adjoining condition and orientation and enter them as one envelope (assigned to the zone
resulting from the merging).
If the internal walls are partitions of light construction and very small thermal mass, then they should not
cause any significant effects on the calculation.
59
Building Types/Activities
Changing facilities
Swimming pool
Dry sports hall
X
Cellular office
X
X
X
X
X
X
Open plan office
X
X
X
X
X
X
Storage area
X
X
X
X
X
Circulation (corridors and stairs) (- non public)
X
X
X
X
Toilets
X
X
X
Tea making
X
X
Reception
X
Meeting room
X
60
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Miscellaneous 24hr activities
Retail Warehouse
Dwelling
Laundry
Industrial process building
telephone exchanges
workshops/maintenance depot
station/train station/seaport terminal
airport terminals
crown and county courts
emergency services
prisons
libraries, museums and galleries
community/day centre
social clubs
theatres/cinemas/ music halls and auditoria
warehouse and storage
retail
sports ground/arena
sports centre/leisure centre
restaurant/bar/public house
hotel
hospital
nursing, residential homes and hostels
primary health care buildings
further education universities
secondary school
primary schools
Office
NEAP Survey Guide
Version: 1.2
Appendix 3: List of Activities
NEAP Survey Guide
Version: 1.2
Food preparation area
X
X
X
Hall/lecture theatre/assembly area
X
Laboratory
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Consulting room
X
X
X
X
X
Patient accomodation (wards)
X
Bathroom
X
X
X
X
Bedroom
X
X
X
X
X
X
X
X
Eating/drinking area
X
X
X
X
Sales area - general
X
X
X
X
Sales area -chilled
X
Display area
Plant room
X
X
Performance area (stage)
X
X
X
Workshop - small scale
X
X
X
X
X
X
X
X
Industrial process area
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
IT equipment
X
X
X
Laundry
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Security check area
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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X
X
X
X
X
X
X
X
X
X
X
High density IT work space
X
X
X
X
X
X
X
Cell (police/prison)
Common room/staff room/lounge
X
X
X
Storage - chilled
X
X
X
X
X
X
Waiting room
Operating theatre
X
X
X
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NEAP Survey Guide
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Baggage reclaim area
X
Check-in area
X
Circulation (public areas)
X
X
X
X
X
X
Warehouse storage
X
X
X
Warehouse storage - chilled
X
X
X
Domestic lounge
X
Domestic kitchen
X
Domestic toilets
X
Domestic dining room
X
Domestic bathroom
X
Domestic bedroom
X
Domestic circulation
X
Warehouse sales - general
X
Warehouse sales - chilled
X
Warehouse sales - electrical
X
Fitness suite/gym
X
X
X
Fitness studio
X
X
X
X
Sales area - electrical
X
X
Ice rink
Classroom
X
X
X
X
X
X
Hydrotherapy Pool
X
Storage area - cold room (<0oC)
X
Intensive care/high dependency
X
Diagnostic Imaging
X
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X
X
X
X
X
X
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NEAP Survey Guide
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Ward offices
X
Ward staff room/day room/lounge
X
A&E consulting/treatment
X
Physiotherapy
X
Speculative office
X
Speculative retail space
X
Speculative industrial space
X
X
Post Mortem
X
Day Patient Accommodation
X
X
X
Data centres
X
Common circulation areas
X
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Appendix 4: Default Data
This section outlines defaults to be used for non-domestic BERs in the absence of evidence supporting nondefault data. Actual data must be used where acceptable evidence is available.
A4.1 Age of Building
The Age of Building/ Year of Construction is used to identify the appropriate default U-values for construction
elements based on the relevant building regulations.
Note on use of defaults:
1) Buildings constructed prior to the introduction of Building Regulations in 1992 were not required to have
insulation; therefore the Assessor must demonstrate that insulation is present when selecting “Pre 1991”
options for external elements. “Pre 1991” assumes a certain amount of insulation is present. If unable to
demonstrate that insulation is present in “Pre 1991” buildings, “No date – Uninsulated” must be used for
external elements from “Help with Inference procedures”.
2) Buildings constructed after the introduction of Building Regulations in 1992 were required to have
insulation, therefore select relevant building regulations for external elements from “Help with Inference
procedures”, except where the element is known to be uninsulated. In this case, select “No date –
Uninsulated” from “Help with Inference procedures”.
3) For internal elements, irrespective of the adjoining condition, select “No date – Uninsulated” irrespective of
the age of the building, unless able to demonstrate that insulation is present. In this case, calculate the Uvalue by adding the insulation resistance to the default U value for the element without insulation. The
internal element U-value is adjusted as per Appendix 8 if adjoining an unconditioned space.
In all cases, the U-value can be calculated using full details of all the layers (where thicknesses and thermal
properties are known).
iSBEM Software Tab: “Project Database ”
Year of Construction
Relevant Building Regulations and selecting defaults.
Pre 1994
(external elements)
“No date – Uninsulated” –is selected unless the element is proven to be insulated.
1994 to 1999
(external elements)
1992 Building Regulations or,
2000 to 2004
(external elements)
1997 Building Regulations or,
2005 to 2007
(external elements)
2002 Building Regulations or,
2008 to 2009
(external elements)
2006 Building Regulations or,
Pre 1991 –where element is proven to be insulated.
“No date – Uninsulated” – where element is known to be uninsulated.
“No date – Uninsulated” – where element is known to be uninsulated.
“No date – Uninsulated” – where element is known to be uninsulated.
“No date – Uninsulated” – where element is known to be uninsulated.
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Post 2009
(external elements)
2007 Building Regulations or,
Internal Elements
“No date – Uninsulated” – unless proven to be insulated.
“No date – Uninsulated” – where element is known to be uninsulated.
A4.2 Constructional Types
The Help with Inference procedures is the main source of default data for external elements, the Library
database may be used if it is more representative of the construction.
iSBEM Software Tab: “Project Database”
Data Entry Item
Construction for
Floors
Construction for
Walls
Construction for
Roofs
Construction for
Doors
Default Value
Select from “Help with Inference procedures” within iSBEM software.
If known to be uninsulated, internal or constructed pre 1994, select “uninsulated” option.
“Import one from the library” may be used where the detail in the library database is more
representative of the construction than that given in the inference procedure.
For Internal Floors/ Ceiling select from “Import one from the library” as the database is more
representative of the construction.
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NEAP Survey Guide
Glazing
Version: 1.2
The survey process provides information on window area, glazing type, age, frame type and
orientation.
If unable to determine whether double glazing is Low “E” or not, assume that double
glazing installed before 2004 is not Low “E” and during or after 2004 is Low “E”.
Assume that double or triple glazing is air filled unless documentary evidence is provided
to substantiate an alternate.
The gap between double and triple glazing panes must be assumed as 6mm unless
measured as otherwise (accounting for pane thickness of 4mm where necessary).
Select from “Import one from the library” within iSBEM software.
Glazing Type is selected from the Glazing Library
Frame Type is selected from the Frame Library:
•
Where possible, select the age appropriate frame for the frame type. For an
Aluminum Frame, select the age appropriate frame. For example, an aluminum
frame installed in 1999, is identified as Frame, 1995-2001.
•
PVC and Softwood Window Frames are not aged profiled. Therefore, select the
most conservative applicable option where no supporting evidence is available to
support alternate construction.
o
For PVC Window Frames the most conservative option is “Plastic frame, 2
hollow chambers, metal spacer”.
o
For Softwood Window Frames the most conservative option is “Wood
frame, metal spacer”
The following examples demonstrate use of the methodology in determining the construction type for
various elements:
Example 1: Roof
The building was constructed in 1975 with a precast concrete flat roof. Following the guidance above the
assessor uses the “Help with Inference procedures” to select the following roof:
“No date, uninsulated” is selected because the building was constructed prior to 1994 and there is no
evidence of insulation.
Example 2: External Wall
The building was constructed in 2002 with a cavity wall system. Following the guidance above the assessor
uses the “Help with Inference procedures” to select the following external wall:
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“Republic of Ireland (1997)” is the relevant building regulation as per the above table. This is selected because
the building was constructed post the introduction of building regulations and is therefore assumed to have
insulation.
Example 3: Solid Brick Internal Wall
The building was constructed in 2010. The internal walls were constructed of 215mm solid bricks. Following
the guidance above the assessor uses the “Help with Inference procedures” to select the following wall:
“No date, uninsulated” is selected as the wall is an internal element. It is assumed that no insulation is present
unless the Assessor can demonstrate otherwise.
Example 4: Internal Stud Partition
The building was constructed in 1995. The internal walls were constructed of a stud partition. Following the
guidance above the assessor uses the “Help with Inference procedures” to select the following wall:
“No date, uninsulated” is selected as the wall is an internal element. It is assumed that no insulation is present
unless the assessor can demonstrate otherwise.
Note: The default U value for lightweight partition walls in iSBEM has a very low U value and does not
represent an uninsulated stud partition wall and therefore should not be used unless the assessor can
demonstrate that insulation is present.
Example 5: Vehicle Access Door
The building was constructed in 2005. Following the guidance above the assessor uses the “Help with
Inference procedures” to select the following door:
“Republic of Ireland (2002)” is the relevant building regulation as per the above table. This is selected because
the building was constructed post the introduction of building regulations and is therefore assumed to have
insulation.
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A4.3 HVAC System Defaults
In some zones, a default HVAC system must be specified. Further Guidance is given in Appendix 7 through the
use of flow charts in helping identify the use of default HVAC systems.
Default HVAC systems are applied to zones meeting the following criteria:
• There is no fixed heating installed;
• There are floor and ceiling finishes, lighting, and ventilation as appropriate;
• The Activity Type requires conditioning;
• There is no proposal to fit out the zone with services in the future;
• Not considered transient, indirectly heated spaces or spaces heated by a process load.
Section 7.5.3 of the iSBEM user guide states “If a zone is defined as having no heating or cooling, i.e., assigned
to ‘Zones without HVAC system’, but the activity type selected for the zone is one which typically requires
conditioning (according to the Activity Database), a red exclamation mark “!”appears next to this parameter
as a warning to the user, in case this was done in error.“
When assuming a default HVAC system following the guidance above and Appendix 7, use the following
table:
iSBEM Software Tab: “HVAC”
Data Entry Item
No evidence of a
HVAC present
Default Value
The default HVAC systems for buildings are as follows:
1.
'Heating only - Electric resistance’ - Assumed to be electric central heating system
with warm air distribution. If you do not know the heating method you should
select electric resistance heating as your default. Selected when no non-electrical
fuels are present.
2.
“Heating only - Other systems’ - Assumed to be wet radiator system, heat generated
by fuel combustion. This is applied where the building also has a fuel source other
than electricity installed.
3.
‘Heating and mechanical cooling’ - Assumed to be constant volume air system with
terminal reheat and fixed fresh air. This is the assumed HVAC system in the absence
of other information for conditioned spaces.
4.
If no HVAC system serves a zone (ie an unconditioned zone in SBEM) select “Zone
without HVAC system”. This is only in the case where it has been justified that a
HVAC system is not required in the zone in the NEAP assessment.
For details Refer to 7.5.3 of the iSBEM User Guide.
The following table outlines examples of when various default HVAC systems apply following the guidance
above:
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NEAP Survey Guide
Default
HVAC
Version: 1.2
Building Condition
Zone Conditions
Heating only -
No alternate (e.g. gas/oil)
•
Electric resistance
fuel present in the building.
System
Zone Activity requires heating (as highlighted by the red
exclamation mark in SBEM), for example:
Offices, Meeting Rooms, Laboratory, Consulting
Electricity may or may not
Room, Sales Area, Performance Area, Classroom
be
Does not include unheated transient, indirectly heated
connected
to
the
building.
spaces or spaces heated by a process load.
•
While the zone activity requires heating, the zone is also
capable of being naturally ventilated and therefore
there is no requirement for cooling. The zone also lends
itself to meeting CIBSE Guide A and the Building
Regulations for naturally ventilated spaces. The CIBSE
Guide A Section 1.4.2.5 and Building Regulation requires
that in the absence of mechanical cooling or mechanical
ventilation, the space temperature will not exceed 280C
for an unacceptable proportion of the period of
occupation. The zone would be expected to achieve
adequate
natural
ventilation
following
Building
Regulation/ CIBSE requirements under the following
circumstances:
•
Internal load is not excessive, and
•
Space can be naturally ventilated for example:
•
Zones not deeper than 7m for single side
ventilation and 14m for cross ventilation
•
Sufficient natural ventilation openings e.g.
openable windows, doors (approximately 5%
of floor area)
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NEAP Survey Guide
Default
HVAC
Version: 1.2
Building Condition
Zone Conditions
Heating only -
Alternate fuel present in the
•
Other systems
building, for example:
System
Zone Activity requires heating (as highlighted by the red
exclamation mark in SBEM, for example:
Offices, Meeting Rooms, Laboratory, Consulting
•
Natural Gas pipework
Room, Sales Area, Performance Area, Classroom
connected to building,
Does not include unheated transient, indirectly heated
whether meter evident
spaces or spaces heated by a process load.
•
or not.
•
•
•
While the zone activity requires heating, the zone is also
Oil Tank Present and
capable of being naturally ventilated and therefore
connected to building
there is no requirement for cooling.
LPG Tank Present and
The zone also lends itself to meeting CIBSE Guide A and
connected to building
the Building Regulations for naturally ventilated spaces.
Solid Fuel Store Present
The CIBSE Guide A Section 1.4.2.5 and Building
appropriate
Regulation require that in the absence of mechanical
size
to
heat building.
cooling
or
mechanical
ventilation,
the
space
temperature will not exceed 28 C for an unacceptable
0
proportion of the period of occupation. The zone would
be expected to achieve adequate natural ventilation
following the Building Regulation/ CIBSE requirements
under the following circumstances:
•
Internal load is not excessive, and
•
Space can be naturally ventilated for example:
•
Zones not deeper than 7m for single side
ventilation and 14m for cross ventilation
•
Sufficient natural ventilation openings e.g.
openable windows, doors (approximately 5%
of floor area)
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NEAP Survey Guide
Default
HVAC
Version: 1.2
Building Condition
Zone Conditions
Alternate fuel present in the
building and where cooling
•
System
Heating and
mechanical
cooling
Zone Activity requires climate control during summer
and it is not possible to naturally ventilate, for example:
Offices, Meeting Rooms, Laboratory, Consulting
is required, for example:
Room, Sales Area, Performance Area, Classroom
•
Natural Gas pipework
Does not include unheated transient, indirectly heated
connected to building,
spaces or spaces heated by a process load.
whether meter evident
or not.
•
Oil Tank Present and
connected to building
•
LPG Tank Present and
•
Solid Fuel Store Present
connected to building
appropriate
size
to
heat building.
Where no alternate fuel is
present in the building but
it is proven that cooling is
required, “Natural Gas” is
selected as the heating fuel.
Currently electricity is not
available as a heating fuel
for
the
default
system,
“Natural Gas” is selected as
it is the heating fuel used in
the notional building.
Transient zones
Some unheated zones have a transient/ passing occupancy such as toilets, changing facilities or tea making
facilities. For transient zones, where “Zones without HVAC system” is selected, it is acceptable for the red
exclamation mark”!” to appear. There are further details on transient spaces in the SBEM Technical Manual
table “List of Activity areas with definitions” and Table A7.2 of this survey guide.
Indirectly conditioned zones
As outlined in section 7.6.8 of the iSBEM user guide, zones “which are not serviced by a HVAC system, i.e. have
no direct supply of heating or cooling, but are likely to be indirectly conditioned by the surrounding areas due
to the high level of interaction with those spaces (allowing the heated air to move freely from the directly
conditioned spaces to the indirectly conditioned ones), they must be considered heated or conditioned
(indirectly) by the same HVAC system that supplies the most important surrounding area”.
An unconditioned enclosed zone is not considered as “indirectly conditioned” as air cannot move freely from
a directly conditioned zone to the unconditioned zone. See Table A7.2.
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A4.4 HWS System
iSBEM Software Tab: “HWS”
Data Entry Item
No evidence of a Hot
Water System present
Default Value
Where a fuel (oil/gas) is supplied to the building, the HWS System:
“Dedicated Hot Water Boiler” should be selected with a fuel type based on fuel supplied
to unit.
Where no fuel is supplied to the building, the HWS System:
“Instantaneous Hot Water only” should be selected with a fuel type of “Grid Supplied
Electricity”
HWS System Storage/ Secondary Circulation Losses: Not present
The iSBEM User Guide Section 7.6.8 states that “Depending on the activity and building
type selected for the zone, a standard hot water demand is assumed. For example, there
is a demand assumed to arise from the occupants of an office for activities such as
washing hands and washing up cups. This demand is associated with the office rather
Hot Water Storage
system insulation if
not accessible
than the toilet or tea room.”
The insulation thickness is based on the age of the storage unit as below: If the age of
the storage unit is unknown, it must be assumed that the storage unit is the same age as
the building.
Pre 1993: No Insulation
1994 to 1999: 25mm Factory Insulated
Post 1999: 35mm Factory Insulated
A4.5 SES System
iSBEM Software Tab: “SES”
Data Entry Item
Evidence of solar
collector present but
data unobtainable
Gross Area obtained
from survey
Default Value
If present, the parameters for the calculation are as follows for each unobtainable item:
- panel aperture area 3 m² ;
- flat panel, glazed;
- facing South, pitch 30°;
- combined cylinder, solar part one-third of total, or if a combi boiler the cylinder
identified is a dedicated solar cylinder. If combined cylinder is accessible, solar storage
volume is portion below the coil directly above the solar heated coil.
Aperture Area= Flat Plate Glazed Gross Area x 0.9
Aperture Area= Evacuated Tube Gross Area x 0.72
A4.6 PV System
iSBEM Software Tab: “PVS”
Data Entry Item
Evidence of PV
present but data
unobtainable
Default Value
If present, the parameters for the calculation are as follows for each unobtainable item:
- PV area is roof area for heat loss, times percent of roof area covered by PVs, and if
pitched roof divided by cos(35°) ;
- Type: Amorphous silicon;
- facing South, pitch 30°.
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A4.7 Wind Turbine
iSBEM Software Tab: “Wind generators”
Data Entry Item
Evidence of Wind
Turbine present but
data unobtainable
Default Value
If present, the parameters for the calculation are as follows for each unobtainable item:
- Height: Estimate relative to height of building;
- Diameter of turbine: Estimate relative to height of turbine;
- Terrain Type: Urban with average building height > 15m.
A4.8 Shell and Core Buildings
For shell and core buildings not all of the services are installed (especially lighting, mechanical ventilation and
cooling) at the point where the building is sold or let. Buildings (or parts of) that are let or sold as bare
structures, without services at all, will nonetheless require a BER as there is an expectation that energy will be
used to condition the indoor climate.
The BER of a Shell and Core building is based on the following:
Data Entry Item
Proposed Design
Available
Default Value
Where a proposed mechanical and electrical design is available, the HVAC and lighting
system are based on the mechanical and electrical specifications, schedules and
drawings for the shell and core unit.
No Design Available –
Electrical Supply Only
to Unit
HVAC System: Select default system “Heating and Mechanical Cooling” which is based
on Terminal reheat (constant volume) and air cooled chiller.
Where no alternate fuel is present in the building, “Natural Gas” is selected as the
heating fuel. Currently electricity is not available as a heating fuel for the default system,
“Natural Gas” is selected as it is the heating fuel used in the notional building.
A HVAC system is assigned to every zone where the activity type selected for the zone is
one which typically requires conditioning (according to the Activity Database), and a red
exclamation mark “!”appears.
HWS System: “Instantaneous Hot Water only” is selected with a fuel type of “Grid
Supplied Electricity”.
HWS System Storage/ Secondary Circulation Losses: Not present.
Lighting: Lighting Parameters Not Available; Lamp Type: Don’t Know.
Lighting Controls: Local Manual Switching.
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NEAP Survey Guide
No Design Available –
Electrical and
Alternate Fuel (oil/gas
etc) Supplied to Unit
Version: 1.2
HVAC System: Select default system “Heating and Mechanical Cooling” which is based
on ”Terminal reheat (constant volume)“ with fuel type as available on site for heating.
Air cooled chiller used for cooling.
A HVAC system is assigned to every zone where the activity type selected for the zone is
one which typically requires conditioning (according to the Activity Database), and a red
exclamation mark “!”appears.
HWS System: “Dedicated Hot Water Boiler” is selected with a fuel type based on fuel
supplied to unit
HWS System Storage/ Secondary Circulation Losses: Not present
Lighting: Lighting Parameters Not Available; Lamp Type: Don’t Know
Lighting Controls: Local Manual Switching
The type of rating published for Shell and Core Buildings must follow the same guidelines as any other
building, namely:
1.
2.
3.
New Building – Provisional Rating: A rating published on the basis of the plans and specifications for a
proposed construction.
New Building – Final Rating: A rating published for a building where construction is complete and has not
been sold or occupied previously.
Existing Building – Final Rating: A rating published for a building where construction is complete and it
has been sold or occupied previously.
As per the Code of Practice, BER Assessors are required to carry out a full building survey where an Existing or
New Final BER certificate is being published. In the case of Shell and Core buildings this may be just verifying
that no services are installed along with collecting other data such as dimensions.
If there is any material change to the data in the BER assessment such as fabric, services for heating, hot water,
mechanical ventilation or air conditioning, the original BER certificate is no longer valid. This applies to all
buildings – not just shell and core buildings.
Zones that are a shell
A “Shell” would typically be a zone where only the bare structure is in place, internal fittings such as flooring
and ceiling finishes, lighting, heating, cooling or ventilation have yet to be installed. For example a retail unit
to be fitted out at a later date by a tenant. The default values in the table above are applied to zones that are a
shell. Once the zone has been fitted out the BER certificate may no longer be valid if there is a material
change in the building affecting the energy performance.
Zone Activity
Typically Shell and Core zones would be office, retail or industrial spaces. In these cases the Assessor should
assign the appropriate activity to the zone:
Zone Type
Shell and Core Office
Zone Activity
Shell and Core Retail
Speculative retail
Shell and Core
Industrial
Speculative industrial space
Speculative office
There may be some circumstances where these activities are not appropriate for the building type. In such
cases the Assessor should select the most appropriate activity type for the building.
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A4.9 Unheated Buildings
A BER assessment is not required for the following unheated building types:
•
•
an industrial building not intended for human occupancy over extended periods and where the installed
heating capacity does not exceed 10 W/m2; or
a non-residential agricultural building where the installed heating capacity does not exceed 10 W/m2
However if the building is unheated and does not comply with the above guidelines, a BER assessment is
required. Further Guidance is given in Appendix 7 through the use of flow charts and matrices in helping
identify the application of unheated building or zones. One such example would be a building with no
installed HVAC due to high internal or process loads. iSBEM must have a heating system applied to a zone in
the building in order for the software to operate.
When carrying out a BER on an unheated building, base the heating system on the notional building’s heating
system and apply it to all zones within the building. For the purpose of this guide, an unheated building is
defined as a building that has been fitted out with other services such as lighting, hot water, mechanical
ventilation etc but has no heating system installed.
As outlined in the iSBEM User Guide Section 2.3, the notional building heating system is based on the
following parameters:
• The efficiency in the notional building is identical to the reference building used for building
regulation compliance.
• The space heating is always met by a gas fired system.
Check that the efficiency of the heating system matches the reference building and hence the notional
building in the BRIRL - Output Document described under section 8.2.2 of the iSBEM User Guide. Refer to the
HVAC Systems Performance section of that iSBEM output as per the diagram below.
Note: The actual Heat SSEEF entry (the heating system seasonal efficiency) must equal the reference Heat
SSEEF. If ventilation or exhaust has been added to a zone, the auxiliary energy may differ. To ensure that the
heating system is set up correctly, turn off all ventilation and exhausts in the iSBEM zones. Then check that the
“Aux con” (auxiliary energy) for the actual building matches the “Aux con” for the reference building. Once
this is confirmed turn on the ventilation and exhaust in the zones as appropriate and run the final BER.
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A4.10 LED Lighting
iSBEM Software Tab: “Zones / Lighting (General) ”
Data Entry Item
Lighting
parameters not
available for LED
system
Default Value
The UK iSBEM User Guide (Table 15) equates LEDs to “T8 Fluorescent – halophosphate – low
frequency ballast” lighting.
As there currently is no default for LEDs in Irish iSBEM, LEDs are therefore assumed to have
an equivalent lumen per circuit watt as a “T8 Fluorescent - halophosphate - low frequency
ballast” where the lighting parameters are not available:
Select “Lighting Parameters not available”
Select “T8 Fluorescent - halophosphate - standard ballast”
A4.11 Display Lighting
iSBEM Software Tab: “Zones / Display Lighting ”
Data Entry Item
Zones incorporate an
activity
whereby
SBEM automatically
assumes the presence
of display lighting but
none
is
actually
present.
Default Value
Where zones incorporate an activity whereby SBEM automatically assumes the presence
of display lighting but none is actually present, the display lighting efficiency for SBEM is
entered based on the general lighting present in that zone.
Where possible this should be calculated, but as this requires detailed measurements of
the lumen (lm) and circuit watt (cW) this is not usually practical in existing buildings. The
following ‘default’ values are used in the absence of more detailed information:
1.
For all general lamp types except Tungsten or Tungsten Halogen, enter that the
display lighting uses efficient lamps and enter 50lm/cW in the relevant “Lumens
per circuit wattage” box.
2.
For Tungsten or Tungsten Halogen general lamps; enter that the display
lighting does not use efficient lamps. In this case, a “Lumens per circuit
wattage” entry is not required.
A4.12 Non Default Km Value
A non-default km value (kJ/m2K) is based on the makeup of the construction. As outlined in the iSBEM User
Guide, the km value is calculated as follows:
km value = density (kg/m3) x thickness (m) x specific heat capacity (kJ/(kgK))
Starting from the layer of the construction closest to the space (interior), add the values together until any
one of the following conditions is satisfied:
•
•
•
The sum of the layer thicknesses has reached 0.1m,
You have reached the mid point of the construction or
You have reached an insulating layer (has a conductivity of 0.08 W/mK or less)
Details of the density for common building materials can be obtained from Building Regulation TGD L –
Buildings Other Than Dwellings (Table A1) or from CIBSE Guide A. Details of specific heat capacity for
common building materials can be obtained from CIBSE Guide A or from the table below:
Material
Clay Brickwork
Concrete Block
Specific Heat Capacity (J/(kgK))
1000
1000
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Material
Cast Concrete
Aerated Concrete Slab
Concrete Screed
Reinforced Concrete
Mortar
External Render
Plaster/ Plasterboard
Natural Slate
Clay Tiles
Asphalt
Felt Bitumen layers
Timber
Wood
Specific Heat Capacity (J/(kgK))
1000
1000
1000
1000
920
1000
1000
840
840
920
1700
1600
1700
The following shows an example of how to calculate the km value for an external wall:
The wall consists of the following construction layers:
Layer (Inner to Outside)
d (mm)
Conductivity
Density
Specific Heat Capacity
Plasterboard
Concrete block (dense)
insulation
Air Gap
Brick outer leaf
13
100
75
50
105
0.18
1.130
0.040
600
2000
20
1000
1000
1450
0.770
1700
1000
As outlined in the iSBEM User Guide, the km value is calculated until the sum of layers equals 0.1m or an
insulating layer is met, in this case the km value is as follows:
600 x 0.013 x (1000/ 1000) =
2000 x (0.1 – 0.013 †) x (1000/1000) =
km value
181.8
†
The 0.1m thickness is reached
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Appendix 5: Non-Domestic Building Services Compliance Guide: 2010 Example.
Assessors must be competent in the use of the Non Domestic Building Services Compliance Guide. This
Compliance Guide outlines how seasonal efficiency is calculated for various heating and cooling systems in
buildings and how credits are applied to increase the efficiency of different systems. Credits are usually
applied based on additional controls installed in the system. Refer to the Non-Domestic Building Services
Compliance Guide to determine if credits apply to the efficiency of the system as installed in the building
being assessed.
The following examples demonstrate use of the Compliance Guide in determining seasonal heating efficiency
(boilers) and SEER of a chilling system.
Example 1: Building with a Condensing Gas Boiler and Standard Gas Boiler.
Information from Building Survey:
Heating Load: 200kW
kW Rating
Fuel Type
Stage
Boiler Efficiency based on Gross Calorific Value
from accredited data
Boiler 1
150kW
Gas
Lead
90% at 100% load
96% at 30% load
Boiler 2
150kW
Gas
Backup
82% at 100% load
86% at 30% load
Using Table 2 of the Compliance Guide the seasonal efficiency is calculated as follows:
Boiler
No
1
2
3
Rating
kW
Boiler % efficiency
at boiler outputs of
100%
30%
Boiler % output at system
outputs of
15%
30%
100%
System efficiency at part load
Weighting factor
Overall seasonal boiler efficiency
Boiler
No
1
2
Rating
kW
150
150
Boiler % efficiency at system
outputs of
15%
30%
100%
0.36
0.45
0.19
Boiler % efficiency
at boiler outputs of
100%
30%
Boiler % output at system
outputs of
15%
30%
100%
Boiler % efficiency at system
outputs of
15%
30%
100%
90
82
20%1
Not
Firing
96.93
Not
Firing
95.1
Not
Firing
90
85.8
96.9
0.36
95.1
0.45
94.65
89.14
0.19
96
86
40%
Not
Firing
100%
33%2
3
System efficiency at part load
Weighting factor
Overall seasonal boiler efficiency
Notes:
1.
Calculated based on the following: 15% x Heating Load (200kW) = 20%
Boiler 1 Load (150kW)
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2.
Calculated based on the following: Heating Load (200kW) – Boiler 1 Load (150kW) = 33%
Boiler 2 Load (150kW)
3.
Calculated by the linear interpolation η b,p = η 30% - (η 30% - η 100% ) * (q b,p – 30%)/ (100% – 30%)
η 20% = 96 - (96 - 90 ) * (20% – 30%)/(100% – 30%)
η 20% = 96.9
4.
Calculated by dividing the thermal output of the system by the rate of fuel combustion,
which is given by the sum of the boiler outputs divided by their individual operating
efficiency.
η 100%
= 200/ ((150*100%/90) + (150*33%/85.8))
= 89.1%
5.
Calculated as the weighted average;
= 0.36* 96.9 + 0.45 * 95.1 + 0.19 * 89.1
= 94.6%
Example 2: Building with 2 Air Cooled Chillers.
Information from Building Survey can be processed in a similar fashion for chillers in a similar fashion to
Example 1 above:
Cooling Load: 500kW
Chiller 1
250kW
Lead
2.5 at 100% load
3.5 at 50% load
kW Rating
Stage
Chiller Efficiency
Chiller 2
250kW
Backup
2.5 at 100% load
3.5 at 50% load
The combined EER value is calculated as follows:
Chiller
1
2
Chiller
kW
250
250
Chiller efficiency at
chiller outputs of
100%
50%
Chiller % output at system
outputs of
25%
50%
75%
100%
Chiller % efficiency at system
outputs of
25%
50%
75%
100%
2.5
2.5
50%
Not
Firing
3.5
Not
Firing
2.5
Not
Firing
2.5
3.5
2.5
2.5
3.5
0.25
2.5
0.25
2.76a
0.25
2.5
0.25
3.5
3.5
100%
Not
Firing
100%
50%
100%
100%
3
System efficiency at part load
Weighting factor (based on unknown application load profile as per
Compliance Guide Section 9.5)
Overall chiller SEER
2.82 b
Notes:
•
Calculated by dividing the thermal output of the system by the rate of fuel combustion, which is
given by the sum of the chiller outputs divided by their individual operating efficiency.
eer 75% = 375/ ((250*100%/2.5) + (250*50%/3.5))
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= 2.76
•
Calculated as the weighted average;
= 0.25* 3.5 + 0.25 * 2.5 + 0.25 * 2.76 + 0.25 * 2.5
= 2.815
Example 3: Existing Building with Gas Boiler and Controls.
Information from Building Survey:
Heating Load: 200kW
kW Rating
Fuel Type
Stage
Boiler Efficiency based on Gross Calorific Value
Temperature Controls
Boiler 1
300kW
Gas
Lead
82%
TRVs on all radiators
Optimised Start/Stop
Using Table 8 of the Compliance Guide the seasonal efficiency is calculated as follows:
Boiler Efficiency
System uses TRVs to ensure full building temperature control
System uses Optimised Start/Stop to achieve specified conditions
during occupancy period
Total Credits
Heating Efficiency Credits
82%
1
2
3
Effective boiler seasonal efficiency:
= Boiler Efficiency + maximum of 4 heating efficiency credits
= 82% + 3%
= 85%
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Appendix 6: Determining Zone Heights and U-Values
Zone Height and Element Areas
•
For ground and intermediate
floors the zone height is from
top of floor slab to top of floor
slab.
•
For top floor the zone height is
from top of floor slab to soffit/
underside of roof slab
•
For the purpose of zone height
and surrounding wall areas,
suspended ceilings and raised
floors are ignored.
For top floors with pitched roof but
flat ceiling:
•
•
•
Zone height is top of floor to
underside of soffit/eaves level h4
Area of gable wall is that below
soffit/eaves level i.e. L4 x h4
U value of Pitched Roof (U pr ) is
from underside of ceiling to
outside
roof
including
insulation irrespective of its
location in the roof.
For top floors with pitched roof and
dropped ceiling (with or without
insulation at ceiling level):
• Zone height is top of floor to
underside of soffit/eaves level h4
• Area of gable wall is that below
soffit/eaves level i.e. L4 x h4
• U value of Pitched Roof (U pr ) is
from underside of ceiling to
outside
roof
including
insulation irrespective of its
location in the roof.
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For top floors with pitched ceiling:
• Zone height is top of floor to
underside of soffit/eaves level h4 (not average room height)
• Area of gable wall is whole wall
up to roof apex (shaded area)
• U value of Pitched Roof (U pr ) is
from underside of ceiling to
outside roof.
For top floors with mono-pitched
ceiling:
• Zone height is top of floor to
weighted average height of all
walls - h4av
• Area of gable wall is whole wall
(shaded area)
• Note that zoning for daylit
areas must be carried out
manually
in
these
circumstances.
• U value of Pitched Roof (U pr ) is
from underside of ceiling to
outside roof.
For Room in Roof or Mansard Roof:
•
•
•
•
Zone height (hw1) = height of
vertical part of wall.
If hw1 varies around the zone,
calculate the area weighted
average height.
The U-value (Uw1) through the
external walls should include
any voids as appropriate.
The U-value (Ur1) through the
first roof construction X1 is roof
structure only.
The U-value (Ur2) through the
second roof construction Y1 is
from underside of ceiling to
outside
roof
including
insulation as appropriate and
void.
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For Room in Roof with Dormer
Window
•
•
•
•
•
As per Room in Roof above.
Zone height (hw1) = height of
vertical part of wall.
If hw1 varies around the zone,
calculate the area weighted
average height.
Do not adjust zone height for
dormer window
The external elements, wall,
roof and glazing of the dormer
window should be included as
normal.
Zone manually for daylight
areas (if glazing >20% of
vertical wall area)
For Warehouse with unusable space
above adjoining zone:
• Zone height is top of floor to
underside of soffit/eaves level h4
• Area of gable wall is whole wall
up to roof apex (shaded area)
• Area of roof is (Y1 + Y2) x
length of the zone
• Height of side walls shown as X
1 and h4
• Area of ground floor and area
of zone is Z1 x length of the
zone
• The internal elements shown as
A1 and B1 should be added as
appropriate.
For Warehouse with usable space
above
adjoining
zone,
the
warehouse is split into two zones:
• Zone height for Z1 is top of
floor
to
underside
of
soffit/eaves level - h4
• Zone height for Z2 is weighted
average height of all walls - hav
as per the monopitched ceiling
guidelines.
• Area of gable wall for Z1 is
whole wall up to roof apex
(shaded area in yellow )
• Area of gable wall for Z2 is
whole wall up to roof apex
(shaded area in orange)
• Area of roof in Z1 is (Y1 + Y2) x
length of the zone
• Area of roof in Z2 is (Y3) x
length of the zone
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Slab Thickness
When there is insufficient proof of the actual slab thickness (not detailed in drawings for example), a default of
250mm is used.
Ensure that where ceiling voids and raised floors exist that these are correctly identified. The depth of the
ceiling voids and raised floors is included in the overall height of the zone. Check that documentary evidence
is maintained to support entry.
Global Zone Height
A global zone height can be set in iSBEM under General and Geometry -> Building Details. The value entered
is given as the global or default zone height in each of the zones. The zone height can be altered, or use the
global height for respective zones. Where a zone height differs from the global/default height, select the
global button
and enter the actual zone height.
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Appendix 7: Identifying the Heating System
A7.1 Building Heating System Flow Chart
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Table A7.1 Examples of Unheated Buildings
The following outlines examples of unheated buildings:
Unheated Parameters
Some Building Types to which the parameters
may apply
Is this building:
- an industrial building not intended for human
occupancy over extended periods and where
the installed heating capacity does not exceed
10 W/m2; or
- a non-residential agricultural building where
the installed heating capacity does not exceed
10 W/m2
Is the building unheated due to a high internal
load from a process providing the heating, for
example a dry cleaners?
•
Warehouse and Storage
•
Industrial Process Building
•
Laundry
•
Retail (Fast food outlet)
Shell and Core Building
•
Office
•
Retail
•
Industrial Process Building
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A7.2 Zone Heating System Selection Flow Chart
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Table A7.2 Examples of Unheated Zones
The following outlines examples of unheated zones:
Unheated Parameters
Some Unheated Zone Types to which the parameters
may apply
The zone does not have fixed heating and
typically does not require conditioning
based on the activity type (no red
exclamation mark “!” shown in iSBEM)
•
Storage Area
•
Circulation Areas
•
Storage – chilled
•
Plantroom
“Zones without HVAC system” is assigned to
the zone.
•
Warehouse Storage
The zone does not contain fixed heating
and is indirectly conditioned by an
adjoining zone open to the zone.
•
Circulation Areas (open to conditioned spaces)
The zone does not contain fixed heating
and is a transient space (not intended for
human occupancy over extended periods)?
•
Toilet
•
Tea Making
•
Changing Facilities
“Zones without HVAC system” is assigned to
the zone. See Survey Guide Section A4.3.
•
Bathroom
The zone does not contain fixed heating
and is heated by a process load within the
zone?
•
Industrial process area
•
IT Equipment
•
Data Centre
“Zones without HVAC system” is assigned to
the zone. See Survey Guide Section A4.3.
•
Laundry
•
Food Preparation
The zone does not have fixed heating and is
a “Shell” (no lighting, heating, ventilation
and cooling) ? eg speculative zones
•
Speculative Office
•
Speculative Retail
•
Speculative Industrial
•
Cellular Office
•
Open Plan Office
•
Meeting Room
•
Classroom
•
Hall / Lecture Theatre/ Assembly Area
•
Laboratory
•
Consulting Room
•
Bedroom
HVAC system of the adjoining heated zone
is assigned to the zone. See Survey Guide
Section A4.3 and iSBEM user guide section
7.6.8
HVAC system assigned to the zone as per
NEAP Survey Guide A4.8
The zone does not have fixed heating,
typically requires conditioning based on the
activity type (red exclamation mark “!”
shown in iSBEM) and does not meet
conditions above.
Default HVAC system assigned to the zone
as per NEAP Survey Guide A4.3
Where fixed space heating is present in the zone, the HVAC system is entered based on the iSBEM User Guide
and NEAP Survey Guide.
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Appendix 8: Adjoining Conditioned and Unconditioned Spaces
Heat losses through building elements, must be correctly accounted for in the BER assessment.
The building element within a zone must have the conditions in the adjoining space assigned to the element.
The following flow chart gives details of when to assign alternate conditions:
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Adjoining spaces, either within the building being assessed or the adjoining building are treated as follows in
iSBEM:
a) “Conditioned Adjoining Space” if the space adjoining the element (zx/xx/xi) has the same activity as the
zone (zx/xx) or is normally heated to similar levels as the zone (i.e. heated to a similar temperature (+/-5oC) for
90% or more of the duration of the zone being specified.)
b) “Unheated Adjoining Space” or “Strongly ventilated spaces” if the above condition is not met.
The heating regime of the adjoining space is determined as follows:
1)
If there is access to details of the zones within the adjoining building, base the parameters for the
element on the activity and installed HVAC system within that zone.
2)
If there is no access to the zones in the adjoining building, base the parameter for the element on the
building type using the following table of temperature profiles for common building types. These
building types have been selected from the SBEM Activity Database for common building types typically
adjoining a non domestic building. The table is based on the SBEM Activity Database for the main
activities within each of the building types.
Building Type
Weekly Temperature Profile
Annual
Profile
All Year
All Year
All Year
Airport Terminal
Transport Terminal
Community/Daycare Centre
Mon to Sun:
Mon to Sun:
Mon to Fri:
12oC - 0 to 24
12oC - 0 to 24
12oC - 0 to 7
22oC - 7 to 18
12oC - 18 to 24
Primary Health Care
Sat to Sun:
Mon to Fri:
12oC - 0 to 24
12oC - 0 to 6
22oC - 6 to 18
12oC - 18 to 24
Further Education University
Sat to Sun:
Mon to Fri:
12oC - 0 to 24
12oC - 0 to 7
20oC - 7 to 20
12oC - 20 to 24
Sat to Sun:
12oC - 0 to 24
Restaurant/public house
Mon to Sun:
12oC - 0 to 6
23oC - 6 to 23
12oC - 23 to 24
All Year
Theatres/cinemas/music
halls and auditoria
Mon to Sun:
All Year
Office
Mon to Fri:
12oC - 0 to 8
22oC - 8 to 22
12oC - 22 to 24
12oC - 0 to 6
22oC - 6 to 19
12oC - 19 to 24
Retail
Sat to Sun:
Mon to Sat:
12oC - 0 to 24
12oC - 0 to 7
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Temperature
All Year
Jan 1 to Jan 12: 12oC
Jan 13 to Mar 20: Weekly
Profile
Mar 21 to Apr 3: 12oC
Apr 4 to June 12: Weekly
Profile
June 13 to Sept 25: 12oC
Sept 26 to Dec 11:
Weekly Profile
Dec 11 to Dec 31: 12oC
All Year
All Year
NEAP Survey Guide
Version: 1.2
20oC - 7 to 19
12oC - 19 to 24
Warehouse
Workshop/
Depot
Maintenance
Sun:
12oC - 0 to 8
20oC - 8 to 17
12oC - 17 to 24
Mon to Sun:
Mon to Sun:
12oC - 0 to 24
12oC - 0 to 24
All Year
All Year
A simple matrix aligned to the table above shows when a building is adjoining another building whether it is
considered conditioned or unconditioned / strongly ventilated.
Conditioned Adjoining Space
Airport Terminal
Transport Terminal
Community/Daycare Centre
Primary Health Care
Further Education University
Restaurant/public house
Theatres/cinemas/music
halls
auditoria
Office
Retail
Warehouse
Workshop/ Maintenance Depot
Workshop/ Maintenance Depot
Warehouse
Retail
Office
Theatres/cinemas/music halls and auditoria
Restaurant/public house
Further Education University
Primary Health Care
Community/Daycare Centre
Transport Terminal
Building in BER Assessment
Airport Terminal
Adjoining Building
Unconditioned Adjoining Space/ Strongly Ventilated Space
and
Example:
If carrying out a BER assessment on an office with an adjoining retail building, base the adjoining condition
from the table as being is a “Conditioned adjoining space”. There is insufficient access to the retail building to
identify the specific zones within. See below:
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However if carrying out a BER assessment on a retail building with an adjoining office building: There is
insufficient access to the office building to identify the specific zones within. Base the adjoining condition
from the table as being an “Unheated adjoining space.” See below
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Where an element is adjoining an Unheated Adjoining Space or a Strongly Ventilated space, the U value of
the element is adjusted to account for the effect of the unheated space. The procedure for calculating the Uvalue is described in the Non Domestic Building Regulations Part L Technical Guidance Document and in
Appendix A of BR 443:2006. The method in BR 443 is derived using EN 13789.
For adjoining buildings it may not always be possible to determine the parameters required to calculate the
Ru value. The following conservative guidelines may be used to derive these parameters where relevant
information is not available on the adjoining building:
U-values of adjoining building’s external elements:
1. If the assessed and adjoining buildings were constructed at the same time and are of similar
construction, the U-values of the external elements of the adjoining building should be
based on the same U-values as the building being assessed.
The building being assessed may have been upgraded since original construction, however
unless the BER Assessor can provide documentary evidence to support that the adjoining
building was upgraded, the U-values of the external elements of the adjoining building are
based on the original construction.
2. If the adjoining building was constructed at a different time to the building being assessed,
base the U-values of the external elements of the adjoining building on default U-values for
the building age using the inference method.
3. If neither of the above options apply or if in doubt, use a conservative default of 2 W/m2K for
all external elements of the adjoining building. This is the default value used in the BRE Uvalue calculator.
Measurements:
1. Base the estimated measurements of the adjoining building on the information available
during the site survey or other available information e.g. planning files etc. The
measurements should be based on the most applicable conservative value with the Assessor
commenting and keeping a record of the calculations.
2. Where access is restricted to the adjoining building, base the dimensions for the adjoining
building on external dimensions.
3. If the external dimensions of the adjoining building are not accessible, estimate the size of
the building as a proportion of the building being assessed. (for example it is twice the
width of the building being assessed and half the height)
4. Where internal zones are not accessible in the adjoining building, the areas and volume
should be based on the entire building.
Ventilation Rate:
The air change rate within the Unheated Space is as per Table A5 of BR 443. The default air
change rate is 3, to be used if the airtightness type of the unheated space is not known.
SEAI have developed an FAQ and calculation tool to assist assessors correcting the U-value adjacent to
unheated spaces within a zone. Please refer to www.seai.ie/berfaq .
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Appendix 9: Determining the Hot Water Storage Volume
Where there is access to the hot water storage unit, determine the storage volume as follows:
a. Determine the hot water storage volume from a label on the storage unit, provided the label
also references a European or National Standard or is CE marked.
b. Take note of the Manufacturer and Model of the unit and determine the volume from
literature from the manufacturer referencing the relevant standards.
c. Take note of the Manufacturer and Model of the unit and contact the manufacturer
regarding the storage volume. The manufacturer must provide written confirmation of the
storage volume.
d. Where data from the above sources is unavailable and the vessel is accessible, measure the
volume of the unit on site. Further detail on this is provided below.
e. Where the hot water storage vessel is inaccessible, documentary evidence from the installer,
architect or engineer identifying the volume of the installed vessel is used.
f. If none of these options are possible base it on the SBEM default.
Measuring a Hot Water Storage Cylinder:
1)
Measure the height and diameter of the hot water storage vessel.
2)
For cylindrical vessels that are between 71 and 441 litres, choose the nearest height and diameter options
from the table below to determine the volume in litres. Insulation thickness is not included in the height
or diameter measurement when using the table. The table below is based on BS1566 and applies to
copper cylinders, however, these figures are also used for other types of storage vessels for the purposes
of NEAP assessments.
The storage vessel diameter is determined based on vessel circumference, dividing the circumference by
π (3.14). Diameter should not include insulation thickness.
3)
Diameter (mm)
Height (mm)
Storage volume
300
1600
96
350
900
72
400
900
96
400
1050
114
450
675
84
450
750
95
450
825
106
450
900
117
450
1050
140
450
1200
162
450
1500
206
500
1200
190
500
1500
245
600
1200
280
600
1500
360
600
1800
440
For cylindrical vessels outside this range, the volume is calculated based on the following:
V = (pi x r2) x h / 1000
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Where: r = radius of the unit (cm)
h = height of the unit (cm)
pi = 3.142
V = volume of unit (litres)
For Enclosed Water Heaters:
The water heater volume is calculated by recording the height, width and depth of the water heater if the
heater is cuboid or the above formula if cylindrical. The cuboid volume is then calculated as follows:
V = h x d x w x 1000
Where: d = depth of unit (m) minus the insulation thickness as appropriate.
h = height of unit (m) minus the insulation thickness as appropriate.
w = width of unit (m) minus the insulation thickness as appropriate
V = volume of the cylinder (litres)
For example
The diagram below shows a water heater with measured dimensions on site for a unit installed in 2005. The
default insulation thickness is therefore 35mm.
The volume of the storage unit is therefore:
V = h x d x w x 1000
h = 550 – (35 x 2) = 480mm
d = 330 – (35 x 2) = 260mm
w = 330 – (35 x 2) = 260mm
Volume = 0.48 x 0.26 x 0.26 x 1000 = 32 litres
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Appendix 10: Selection of Solid Fuel Type.
Solid fuel appliances can be fuelled by coal, anthracite, smokeless fuel, dual fuel (mineral and wood) and
biomass.
For solid fuel boilers and heaters the fuel type is chosen as follows, proceeding from points 1 towards 4 until a
choice is made:
1)
If the heating appliance is designed to burn only biomass, i.e. its design is such as to
prohibit the use of any other fuel type, then the appropriate fuel type (biomass) should be
selected. Otherwise biomass should not be selected. This can be demonstrated by one of
the following:
i. Documentation showing that the product warranty is void if the product is used
with any fuel type other than biomass ;
ii. Listing of the product under http://www.hetas.co.uk/ showing that the appliance
burns biomass only.
Where there is any doubt about fuel type selection biomass should not be selected.
2) If the appliance is designed to burn a particular coal-based or peat-based fuel type, then
that should be chosen as the fuel.
3) If the appliance can burn more than one fuel type, the most likely non-biomass type should
be selected based on (a) the appliance design, and (b) the building location (taking account
of smoke control areas and fuels common in the area).
The following table summarises the information above:
Scenario
Appliance can only burn
biomass
Appliance can burn
multiple solid fuels but a
particular fuel is the most
commonly available or
applicable non-biomass
fuel in the area
Biomass
Manufactured
smokeless fuel
One of coal or
anthracite
Yes
No
No
No
Yes - Select
manufactured
smokeless fuel when
building is in “smoke
control area” and the
appliance can burn
multiple fuels
Yes - Select one of these
fuels when building is in
non “smoke control
area” and that fuel is
clearly the most
commonly available fuel
in the area
Smoke control areas (also called coal restricted areas) can be identified using the facility under
http://maps.epa.ie or following guidance on the Department of Environment, Community and Local
Government website. Individual Local Authorities may have further details.
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Version: 1.2
Appendix 11: Identifying Common Lighting Systems
The following are examples of various lighting systems:
Tungsten Lamps
Compact Fluorescents
.
Tubular Fluorescents
T5:
T8:
T12:
16mm diameter
26mm diameter
38mm diameter
Metal Halide
.
The SEAI website provides a number of lighting guides. These are useful in identifying different lighting
systems: http://www.seai.ie/Your_Business/Technology/Buildings/Lighting.html.
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