DEAP Survey Guide Version 2.1 (January 2012)

DEAP Survey Guide Version 2.1 (January 2012)
Dwelling Energy Assessment Procedure (DEAP)
Survey Guide
VERSION 2.1
DEAP is the official procedure for the calculation of energy performance of dwellings in Ireland
for the purposes of producing Building Energy Ratings (BER).
This document describes the DEAP survey methodology for dwellings. The DEAP Manual
detailing the assessment methodology dwellings must be followed alongside this document.
In particular, Appendix S in the DEAP Manual provides further survey guidance and suitable
default data to be used where actual data cannot be determined.
BER assessors, building designers and other users should ensure that they are using the latest
version of these documents and accompanying software. Information and any updates will be
published on the SEAI website at www.seai.ie/ber
Full BER surveys are to be carried out for “New-final” or “Existing” dwelling assessments. “Newprovisional” ratings do not require a site survey as the provisional rating is carried out off plans
for dwellings 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.
Published by:
The Sustainable Energy Authority of Ireland, Wilton Park House, Wilton Place, Dublin 2
January 2012
Contacts:
t
1890 734237
e
[email protected]
w
www.seai.ie/ber
Copyright © 2012 The Sustainable Energy Authority of Ireland. All Rights Reserved
DEAP Survey Guide
Version 2.1
Contents
1 Introduction
2 2 Survey Documentation and Equipment
3 3 Data Gathering
3.1 External Survey
3.2 Internal Survey
3.3 Dwelling Sketches and Architectural Drawings
3.4 Room by Room Survey
3.5 Attic Space Survey
3.6 DEAP Survey Tips
3 4 4 4 5 5 6 4 Guidance on Supporting Evidence
7 18 Appendix I: DEAP Survey Form
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Introduction
This guide is designed to assist Building Energy Rating (BER) Assessors to carry out
BER assessments on dwellings using the Dwelling Energy Assessment Procedure
(DEAP) software. This guide must be used in conjunction with the DEAP Manual
when BER Assessors are filling out the DEAP Survey Form1 (Appendix I). This form
must be used on site to gather survey data required to complete a BER assessment
for a dwelling using the DEAP software.
This DEAP Survey Guide indicates the necessary supporting data or evidence
required when completing Building Energy Rating (BER) assessments on dwellings
particularly when using values other than the defaults listed in Appendix S of the
DEAP Manual. Defaults from DEAP Appendix S are only to be used where evidence
of non-defaults have been sought and are unavailable. Use of substantiated nondefaults is encouraged as it will result in a more accurate BER grade for the
dwelling.
In addition, BER Assessors are required to adhere to the BER Assessor’s Code of
Practice at all times.
This DEAP Survey Guide is expected to be updated at regular intervals or as
necessary. Up to date versions can be downloaded from www.seai.ie/ber.
When conducting a dwelling 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 dwelling 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
dwelling 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, the DEAP manual or any other
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.
All dwelling surveys are expected to be non-invasive. Nothing in this document,
the DEAP manual or any other 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 own and the
householder’s risk and is not required by SEAI.
1
BER Assessors may use a survey form of their own format provided all of the information contained
in the SEAI issued Survey Form is retained with the BER assessment.
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If invasive survey methods are used such as to demonstrate an applicable nondefault U-value, then, while these methods are not required in the DEAP
methodology, they can be considered as a source of supporting evidence. This
supporting evidence for each relevant exposed surface must clearly indicate that
the non default U-value being specified is appropriate for the building element in
question.
2
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 dwelling. These include (but are not limited to):
Documentation:
 DEAP Manual
 DEAP Survey Guide
 DEAP Survey Form (Ref. Appendix I)
 Pencil, paper and eraser
 Graph Paper (for sketching dwelling plans and elevations)
 Dwelling architectural drawings and/or specifications
Equipment:
 Measuring tape (recommended minimum length of 10 metres). Electronic
measuring devices may be used, provided all measurements are accurate and
the equipment is properly calibrated. Appendix S of the DEAP Manual sets out
further detail on acceptable levels of accuracy when performing BER
assessments for existing dwellings.
 Ruler
 Calculator
 Directional compass
 Flashlight
 Camera with flash
 Key for electricity meter and key for gas meter (standard tools will not open
gas or electricity meters)
 Ladder
 Personal protective equipment as necessary
3
Data Gathering
For all data gathered, supporting evidence may be required as detailed in this
section.
BER Assessors should endeavour to gather as much data,
photographs, sketches/plans and supporting evidence as possible (and
indeed practicable) 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 section 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. Specific queries related to the acceptability of
supporting data should be directed to the BER Helpdesk.
The DEAP Survey Form (Appendix I) assists BER Assessors in ensuring that they
have gathered all the necessary data during the survey. This includes data
regarding the dimensions, building age, building fabric elements, relevant items
per room, heating system(s), hot water services, heating controls and lighting. This
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will generally be accompanied by dwelling sketches, architectural drawings or
specifications and comments related to various aspects of the site survey.
Prior to performing a site survey for a BER assessment, BER Assessors should
contact the client to ensure that access will be granted to the heating system at
the time of the survey. In particular, access to group heating system boilers may be
restricted unless it has been arranged prior to the site visit. If access still cannot be
gained and information is not available from plans/specifications, then the defaults
listed in the DEAP Manual (Appendix S and Table 4) should be used.
Please note that definitions in the DEAP Manual must be followed at all times.
3.1
External Survey
An initial survey of the outside of the dwelling (if possible) is very useful.
Information which can be gathered through this external survey is as follows:
 External measurements to establish the overall footprint of the dwelling.
External measurements must be converted to internal measurements before
calculating floor area and heat loss areas. An external wall length is converted
to an internal wall length by subtracting the wall thickness of the adjoining
wall at both ends
 Establishing ventilation features such as number of vents, extract fans and
sheltered sides
 Assessing age band indications, such as meter box date information
 Wall construction is often evident where the meter box has been fitted
 Confirming the orientation of the dwelling using a directional compass
3.2
Internal Survey
An initial walk around inside the dwelling is very useful and will assist in
determining the following information:
 Confirming heat loss envelope elements such as ground floor type(s), wall
types, window variations and in completing survey sketches for each floor, wall
and other element types
 Assessing age band indications such as date stamp in the gap within
double/triple glazing
 Confirming the ventilation as indicated from outside the dwelling. Checking
that no vents have been blocked, and identifying the type of controls (if any)
on the vents
 Identifying thermal mass composition, i.e. external wall, internal partitions,
floors. Appendix S and Table 11 of the DEAP Manual provide guidance on
thermal mass
 Average storey height for each dwelling storey.
3.3
Dwelling Sketches and Architectural Drawings
A sketch of the dwelling must be done with plans and elevations. Sketches,
combined with the Survey Form and other evidence as outlined in this document,
must provide enough data to complete a BER assessment using the DEAP
software. Where architectural drawings (dwelling plans) 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
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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
entered in the DEAP assessment should reflect the actual measurements taken
during the dwelling survey.
As a guide, the sketches/drawings should at least indicate the following:
 Extensions
 Different walls, floors and roof types
 Dimensions (total floor area, wall thickness, floor height, heat loss areas)
 Living area and dimensions thereof
 Unheated spaces – identifying walls between heated and unheated space
 Sheltered sides (indicating distance, height and width of sheltering objects
and adjacent properties)
 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)
- Estimated gap between panes if possible to determine
- Overshading estimate on each opening
3.4
Room by Room Survey
Each room must be checked for the following:
 Total light bulb count and number of low energy lights
 Properties of openings such as:
- Type of glazing (double, single, triple, stamp/brand on windows)
- Dimensions
- Frame type
- Gap between glazing
- Overshading
- Orientation
- Draught stripping
 Ventilation
 Living room area (for the appropriate room)
 Heat sources and controls (including TRVs and programmers)
This information must all be recorded in the DEAP Survey Form (Appendix I).
3.5
Attic Space Survey
Some useful dwelling compositional properties can be determined by accessing
the attic space:
 Evidence of wall construction
 Roof insulation thickness (for insulation on the ceiling)
Particular attention must be paid to health and safety issues when accessing
attic spaces.
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DEAP Survey Tips
Where possible open the doors within the dwelling to establish the floor lengths
when performing internal measurements. This reduces the number of internal
measurements required.
The homeowner may have useful information on extensions to existing dwellings
or other works which have been carried out. Supporting evidence (either
photographic or documentary) regarding extension existence and age must be
produced.
Ask the homeowner about “cold areas” in the house to indicate excessive
ventilation draught or possible lack of insulation. The Assessor should also ask the
homeowner if they know of any work which has been done on the dwelling which
is likely to impact on the DEAP assessment. While the word of the homeowner in
itself is not sufficient supporting evidence, it will help the Assessor to determine if
they should aim to use non default data with the aid of appropriate supporting
evidence as detailed in this document.
The local planning authorities may have information available pertaining to
dwellings (particularly in relation to dwelling age). If a copy of the planning
application, planning permission or commencement notice is available, this could
also assist with the dwelling survey.
Where dwellings are fully renovated, the age band may be based on the age of the
original building or the date of refurbishment. For example where an older
building is converted into apartments, this is likely to be subject to extant Building
Regulations at the time of refurbishment and the age band would be based on
that refurbishment date. However, renovation or partial renovation of a house may
not be subject to the extant Building Regulations and should have an age band
based on the original building’s age.
Where a non default U-value is being used, then DEAP Tables 12a and 12b may be
used to give thermal conductivity of common insulation materials and building
materials. DEAP Table 12b may not be used for dwellings undergoing a “new-final”
assessment.
All stated non-default U-values must be accompanied by calculations done to the
relevant standards.
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Guidance on Supporting Evidence
As a general rule the defaults values in DEAP are conservative and must be used
unless non-defaults can be supported through other documentation or evidence
captured on site. For example, the BER Assessor should assume basic on/off
heating controls unless they observe and collect evidence of zoning, timers,
thermostats, etc.
The following diagram illustrates the order of priority for each data item in a BER
assessment.
1. The actual data observed on site takes precedence.
2. Where the data item is not observable, it should be detailed using
documentary evidence. Documentary evidence must be retained with the
assessment records.
3. Where the data item is not observable on site or via documentary
evidence, then a default is used.
This order of priority must be born in mind for all parameters entered in the DEAP
software.
Photographs (or scans/copies if feasible) must be taken of documentation such as
bills, invoices, receipts, dwelling specifications (from the developer, architect or
engineer). All copies of supporting evidence and documentation should be clear
and legible.
Receipts and invoices (for retrofitted insulation for example) must be clearly
related to the specific dwelling address and display the date the work was carried
out or the product was supplied.
Guidance in relation to the use of supporting evidence to enable the entry of data
other than default data into the different tabs in the DEAP software is given in
tabular form below. All items relevant to the particular dwelling must be recorded
in the DEAP Survey Form as supporting evidence. Additional forms of supporting
evidence are also identified, e.g. photographs, etc.
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Reports of works carried out in the dwelling from a supervising engineer or
architect are acceptable as supporting evidence. Reports need to provide sufficient
detail for the DEAP entry in question. For example, for retrofitted insulation, the
report must detail the material type, thickness and thermal conductivity, density of
fill, etc.
In cases where Assessors are unsure if they have sufficient supporting evidence
they should contact the BER Helpdesk for guidance.
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DEAP Software Tab: “Start”
Data Entry Item
Dwelling type
Dwelling and extensions
age
MPRN number
Is there an extension?
Purpose of rating
Comment box
Guidance
External photo of the dwelling must be taken to indicate
dwelling type. Any adjoining dwellings must also be shown in
the dwelling photos so that the dwelling type may be correctly
determined. The photograph must be marked or outlined such
that the dwelling can be identified and distinguishable from the
adjacent properties.
Legal documents indicating dwelling age are preferable. In the
absence of relevant legal documentation, then at least two
of the following indicators may be used:
 Stylistic evidence
 Dwelling or development age plates
 Electricity meter age
 Glazing age printed within double or triple glazing
 Homeowner knowledge
Similar methods must be applied when determining the age of
extensions.
The MPRN can be found on the electricity bill for the dwelling.
In the absence of electricity bills, the MPRN may be printed in
the electricity meter box or this information can be sourced
from the ESB. The MPRN extranet on the National
Administration System (NAS) should be used to confirm that the
MPRN is correct.
There are a number of potential indicators as to the existence
and area covered by the extension such as:
• Homeowner knowledge;
• Different windows to the original dwelling;
• Different roof type to the original dwelling;
• Different radiators to the original dwelling;
• Different room height to the original dwelling;
• Different natural ventilation (such as background
wall/window vents) to the original dwelling;
• Change in rendering from the original dwelling;
• The presence of two heating systems may indicate the
existence of an extension.
The client should indicate the purpose of the rating to the BER
Assessor.
The comment boxes in the DEAP Survey Form (and DEAP
software) should be used to describe unusual aspects of the
dwelling such as retrofitted insulation, extensions, renewables
installed and so on.
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DEAP software tab: “Property and Assessor Details”
Data Entry Item
Property address
Guidance
Property address should be taken from electricity bills. In the
absence of these, other utility bills should be used. The address
must 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. Further
guidance on attaining the correct property addresses is
published in the September 2009 Domestic BER Technical
Bulletin.
DEAP software tab: “Dimensions”
Data Entry Item
Floor areas
Storey heights
Room in roof floor areas
Living area
Guidance
Dwelling sketches or architectural drawings must contain details
of floor dimensions.
Floor thicknesses between storeys should be taken from
drawings where available or may be taken from defaults,
particularly for existing dwellings (see DEAP Manual Appendix
S).
Dwelling sketches or architectural drawings must contain details
of floor dimensions. The DEAP Software auto-calculates room in
roof heat loss areas for existing dwellings.
Follow DEAP Manual guidance using living area recorded in
dwelling sketches or architectural drawings.
DEAP software tab: “Ventilation”
Data Entry Item
Guidance
Count of chimneys
Follow guidance in the DEAP Manual. Note, as per Section 2.1 of
the DEAP Manual, the specified ventilation rate for chimneys
(and open flues) “includes an allowance for the associated
permanent vent for air supply, so this vent should not be
entered separately”.
The DEAP Manual must be followed as it distinguishes between
open flues, chimneys and room sealed appliances.
Photographs of typical wall/window background vent must be
taken as evidence. Pay close attention to Section 2.2 of the
DEAP Manual in relation to trickle vents, controllable vents and
permanently open vents. The minimum open area of 3,500mm2
equates to an (open) circle of 67mm diameter.
See ventilation section in DEAP Manual
Count of open flues
Intermittent fans and
background / passive
vents
Flueless combustion
roomheaters
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Draught lobby
Pressure (permeability)
test
Structure type
Solid/suspended ground
floors
% Draught stripping
Sheltered sides
Whole house mechanical
ventilation
Sketch/architectural drawings and/or photograph required as
supporting evidence for draught lobby.
Clear photograph or photocopy of pressure test certificate (with
legible text) required. Address of dwelling and date of pressure
test must be visible. Test data must be from an individual or
organisation with relevant accreditation.
Alterations to the dwelling envelope subsequent to pressure
test render that test certificate invalid.
DEAP defaults (“no pressure test”) may be used.
Photographic evidence must be provided to show structure
type. Detail from dwelling plans and/or specifications may also
be used in determining the structure type.
For suspended floors, assume unsealed unless it can be easily
proven otherwise. See DEAP Manual for further detail.
Double/triple glazed windows usually have draught stripping. If
draft stripping fitted to single glazed windows, photographic
evidence must be taken to support this. Draught stripping on
doors and attic hatches must also be accounted for.
Follow section 2.5 of the DEAP manual when determining the
number of sheltered sides. Sheltered sides must be shown on
sketches/ architectural drawings (indicating distance, height
and width of sheltering objects and adjacent properties).
Photographic evidence can be used to record make, model and
configuration/ducting of heat recovery unit (or other
mechanical ventilation types) in cases where non-default SAP
Appendix Q data is being used. If the unit is inaccessible, then
dwelling specifications, invoices or receipts may be used to
determine the make/model of the ventilation system.
DEAP software tab: “Building Elements”
Data Entry Item
Heat loss floor
U-values
Guidance
It is unlikely that there will be sufficient information available on
site to calculate the floor U-value. However, detail of the actual
floor parameters on site must be used where available.
Photographs of the relevant information must be kept on file.
Where insulation is not accessible, documentary evidence of
type and thickness of installed insulation and other layers in the
building element in question must be used where available.
Copies of documentation must be kept with the records for the
assessment. When using documentary evidence, the
documentation must indicate that the entire heat loss surface
has achieved the non default U-value.
Certified data for insulation thermal conductivity is required
when calculating non-default U-values for new dwellings.
Thermal conductivities from DEAP Table 12b may be used for
existing dwellings if certified data is not available.
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Floor perimeter and areas
Heat loss roof
U-values
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Where there is insufficient information available to calculate Uvalues, then defaults from DEAP Appendix S must be used as
indicated in Section 4 above.
Internal areas and exposed perimeters must be measured and
recorded on dwelling sketches or architectural drawings.
It may be possible to gather information on site in relation to the
dwelling roofs and this information must be used where
available. Photographs of the relevant information must be kept
on file. Ensure insulation depth is established by taking the
average of a number of measurements (including insulation
levels on attic hatches). Different U-values (e.g. significantly
different depths or materials) must be treated as separate roofs
in DEAP.
Where insulation is not accessible, documentary evidence of
type and thickness of installed insulation and other layers in the
building element in question must be used where available.
Copies of documentation must be kept with the records for the
assessment. When using documentary evidence, the
documentation must indicate that the entire heat loss surface
has achieved the non default U-value.
Certified data for insulation thermal conductivity is required
when calculating non-default U-values for new dwellings.
Thermal conductivities from DEAP Table 12b may be used for
existing dwellings if certified data is not available.
Roof area
Heat loss wall U-values
Where there is insufficient information available to calculate Uvalues, then defaults from DEAP Appendix S must be used as
indicated in Section 4 above.
Internal areas must be measured on site and recorded using
dwelling sketches or architectural drawings.
It may be possible to gather information on site in relation to the
dwelling walls and wall type and this information must be used
where available. Photographs of the relevant information must
be kept on file. Note that a filled cavity wall may show drill marks
above, below and to the sides of each window and spread out
across larger wall sections. These marks are typically filled with
mortar. If using the presence of these marks as evidence of
cavity wall fill insulation, they must be visible on each facade for
which the filled cavity wall U-value is to be applied.
Where insulation is not accessible, documentary evidence of
type and thickness of installed insulation and other layers in the
building element in question should be used where available.
Copies of documentation must be kept with the records for the
assessment. When using documentary evidence, the
documentation must indicate that the entire heat loss surface
has achieved the non default U-value.
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Certified data for insulation thermal conductivity is required
when calculating non-default U-values for new dwellings.
Thermal conductivities from DEAP Table 12b may be used for
existing dwellings if certified data is not available.
Where there is insufficient information available to calculate Uvalues, then defaults from DEAP Appendix S must be used as
indicated in Section 4 above.
If the wall type is unidentifiable you must assume that the wall is
”unknown” wall type.
Wall area
Door U-value
Door area
Window U-value
Window Area
Window overshading
Window orientation
Thermal bridging factor
Internal areas must be measured and recorded using dwelling
sketches or architectural drawings.
The default door U-values in DEAP Table 6a must be used unless
proven otherwise by photographs or certificates of thermal
performance. Table 6 in the DEAP Manual provides details on
how to determine the U-value of a partially glazed door.
Doors should be measured on site, although for existing
dwellings, Assessors may use the default values given in DEAP
unless it is obvious that they are not applicable. Measured door
areas are recorded as openings on the DEAP Survey Form and
may also be shown on sketches or architectural drawings. When
using the default door area, double doors are input as 2 doors in
the DEAP software.
Original installation documentation from the developer or
installer detailing window make and model can be used if
available (to obtain certified data). When a non-default window
U-value is being used, then a non-default, certified solar
transmittance value must also be specified in DEAP.
Representative photographs of the window, gap between
glazing, manufacturer’s stamp can be used as supporting
evidence when using defaults from DEAP Table 6.
DEAP Section 3.2 outlines how default window U-values and
solar transmittance values are obtained in the absence of
certified data.
On site measurements must be recorded on dwelling sketches
or architectural drawings. Window details can also be recorded
on the DEAP Survey Form.
Use of non defaults is encouraged and photographs are used as
supporting evidence.
The window orientation must be recorded on the dwelling
sketches or architectural drawings.
Default of 0.15 as per Appendix S of DEAP Manual for new and
existing dwellings. For new dwellings, follow DEAP Appendix K.
Use of non-defaults is based on documentation from the
developer/architect/engineer specified in DEAP Appendix K.
Documentation supporting a non-default thermal bridging
factor must contain or refer to each of the relevant items/detail
diagrams.
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DEAP software tab: “Water Heating”
Data Entry Item
Distribution losses y/n
Storage losses y/n
Supplementary electric
water heating in summer
y/n
Combi-boiler y/n
Storage temperature
factors
Water storage volume
Insulation type of the
water storage volume
Is hot water storage
indoors or in group
heating scheme?
Thickness of storage
insulation
Primary circuit loss type
Guidance
Generally the answer will be "yes". If entering "no" evidence
must be provided (for example representative photographs of
heaters at hot taps can be taken).
Generally the answer will be "yes". If entering "no" evidence
must be provided (for example representative photographs of
an instantaneous combi-boiler without storage).
Follow guidance in DEAP Manual Section 4.6. Representative
photographs of heating controls must be taken (such as switch
or timer separating space and water heating).
Common Indicators to look for are as follows:
Make and model of the boiler.
There may be no storage outside of boiler.
The boiler is likely to have two sets of flow/return pipes.
Note that a combi boiler could have an internal store.
The relevant supporting data must be recorded on the DEAP
Survey Form.
Follow guidance in DEAP Manual. Representative photographs
of heating controls must be taken (such as water heating timer
and/or thermostat).
Assessors must record the water storage volume and the means
by which that volume was determined. Follow DEAP Table 2a to
derive the hot water storage volume. Height and width of the
storage volume should not include the insulation thickness. The
means by which the water storage volume was derived must be
detailed in assessment records.
Hot water storage insulation type must be measured on site or
derived from labels on the storage volume or product
documentation. Details are to be recorded on the DEAP Survey
Form.
Alternatively, please follow the rules as per Appendix S of the
DEAP Manual.
This is set to “yes” if the majority of the installed hot water
storage as entered under the DEAP “water heating” tab is within
the dwelling total floor area and is therefore contributing to the
dwelling’s heat gains. It is also set to “yes” if the hot water
storage is part of a group heating scheme.
Measure insulation thickness where accessible and record the
details on the DEAP Survey Form. Otherwise use defaults in
Appendix S of the DEAP Manual.
It may be difficult to show evidence of primary circuit insulation
between all pipes from heat source to the hot water storage
volume. Dwelling specification or retrofit works documentation
may be used as supporting evidence. The default is that primary
pipework is uninsulated.
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Solar thermal panels
Aperture area of solar
panels.
Zero loss collector
efficiency
Collector heat loss
coefficient
Photographic evidence of existence and layout of solar panels
must be taken to support the data inputs. Installation and
manual documentation or product labelling should be sought.
If available, a copy of relevant documentation must be taken.
Determine make and model where possible. Solar panels on the
dwelling may be listed on the HARP database or certified data
may be obtainable.
Use data from HARP where available. Alternatively data may be
obtained from certified data. If relying on defaults, follow
Appendix S Table S11 and Appendix H in the DEAP Manual.
Data must be recorded on the DEAP Survey Form.
Annual solar radiation
Refer to Appendix H. Tilt and orientation needs to be
established and then Table H2 in DEAP is used. This data must
be recorded on the DEAP Survey Form.
Solar collector
overshading, orientation
and tilt
Follow Appendix S Table S11 and Appendix H, Table H3 in DEAP.
This data must be recorded on the DEAP Survey Form.
Dedicated solar storage
Follow guidance in Appendix H. For combined cylinder,
measure below boiler/heat pump coil pipes. Volume and
location of pipes may also be available from water storage
datasheets.
This data must be recorded on the DEAP Survey Form.
DEAP software tab: “Lighting and Internal Gains”
Data Entry Item
% of low energy fixed
lighting outlets
Guidance
Follow DEAP Manual guidance, particularly Appendix L. Data
gathered during the dwelling survey must be recorded on the
Survey Form, dwelling sketches or architectural drawings.
DEAP software tab: “Net Space Heat Demand”
Data Entry Item
Thermal mass category
Guidance
For new dwellings, use DEAP Table 11 and indicate the overall
thermal mass category on the DEAP survey form. Calculations to
determine the overall mass category via the derivation of the
“AmAf” value must be held on file. The overall thermal mass
category is one of Low; Medium-low; Medium; Medium-high or
High.
For existing dwellings, follow Table S10 in Appendix S of the
DEAP Manual and indicate the thermal mass of walls and floors
in the DEAP Survey Form.
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DEAP software tab: “Distribution System Losses and Gains”
Data Entry Item
Temperature adjustment
Control category
Responsiveness category
Central heating pump
Oil boiler fuel pumps
Gas boiler flue fan
Warm air heating or fan
coil radiators present?
Guidance
Follow guidance in the DEAP Manual. Representative
photographs of heating controls (such as TRVs, zone valves
room thermostats, water thermostats, timers and any other
relevant controls) must be taken. Details must be recorded on
the DEAP Survey Form.
Follow guidance in the DEAP Manual. Representative
photographs of heating controls must be taken. Details must be
recorded on the DEAP Survey Form.
Follow guidance in the DEAP Manual. Representative
photographs of heating controls must be taken. Details must be
recorded on the DEAP Survey Form.
Follow guidance in the DEAP Manual. Details must be recorded
on the DEAP Survey Form relating to central heating pumps
distributing heat to space heating emitters. Calculations for nondefault central heating pump power as per Table 4f may be
carried out if sufficient information is available. Also, record
presence of room thermostat on heating system and details of
pump location (inside or outside dwelling area being assessed).
Follow guidance in the DEAP Manual. It is likely that an oil boiler
will contain an internal fuel pump. There may be another
external fuel pump and this must be accounted for. Details must
be recorded on the DEAP Survey Form. Also, record presence of
room thermostat on heating system and details of pump
location (inside or outside dwelling area being assessed).
Follow guidance in the DEAP Manual. It is likely that a gas boiler
will have a gas boiler flue fan. Details must be recorded on the
DEAP Survey Form.
Follow guidance in the DEAP Manual. Warm air may be installed
as an alternative to radiators or underfloor heating. Warm air
heating should not be selected to represent heat recovery
systems as related fan power is already accounted for in
ventilation tab. Fan coil radiators have an electric fan to
distribute heat to the room from the radiator. Details must be
recorded on the DEAP Survey Form.
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DEAP software tab: “Energy Requirements”
Data Entry Item
Guidance
Photographs of the heating system must be taken to support
data inputs. Photographs of nameplates with manufacturer
name and model number can also be taken for HARP lookup.
Make and model should be recorded in DEAP. Appendix A and
Main Space and Water
Table 4 in DEAP manual must be followed. Heating system
heating system
manuals or installation certificates can also be copied and used
as supporting data. DEAP Manual rules apply when determining
heating system efficiencies. Details must be recorded on the
DEAP Survey Form.
Photographs of the heating system can be taken to support data
inputs. Photographs of nameplates with manufacturer name
and model number can also be taken for HARP lookup. Make
and model should be recorded in DEAP. Appendix A and Table 4
Secondary heating system in DEAP manual must be followed. Heating system manuals or
installation certificates can also be copied and used as
supporting data. DEAP Manual rules apply when determining
heating system efficiencies. Details must be recorded on the
DEAP Survey Form.
If a solid fuel burner is capable of burning more than one type of
fuel, follow Section 10.3.3 of the DEAP manual in determining
Fuel data
the correct fuel type. Details must be recorded on the DEAP
Survey Form.
A bill showing evidence of a group heating scheme is required
to support the data inputs. Documentary evidence from the
Group heating scheme.
group heating provider or system designer, etc. is also
acceptable. Details must be recorded on the DEAP Survey Form.
The age of the dwelling is required here. Supporting data /
documentation from the service provider is also required for
Distribution loss factor
group heating schemes. See DEAP Appendix C1.1. Details must
be recorded on the DEAP Survey Form.
DEAP Appendix N applies. Details must be recorded on the
Combined Heat and
DEAP Survey Form. Where available, efficiency data is taken
Power (CHP) for group or
from test reports based on a national standard or the CHP
individual heating system.
Directive 2004/8/EC.
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Appendix I: DEAP Survey Form
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DEAP Survey Form page2
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DEAP Survey Form page 3
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DEAP Survey Form page 4
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