Dimplex | SCx175sd | Electric heating solutions Part L up to and including 2010

February 2009
Cl/SFB (56)
www.dimplex.co.uk
Specifiers Guide to
Electric heating
solutions Part L
up to and including 2010
FLATS
APARTMENTS
TERRACED DWELLINGS
index
Document scope
3
About Dimplex
4
Overview of Part L1A - new domestic dwellings
5
Block Assessment Method
6
Reducing Building CO2
6-7
Part L 2006 Dimplex electric heating solutions
8-9
Scenario – Complying with Part L 2006 – multiple dwellings
10
Scenario – Complying with Part L 2006 – terraced homes
11
Scenario – Complying with Part L 2010 – multiple dwellings
12
Scenario – Complying with Part L 2010 – terraced homes
13
Product overview
2
– DuoHeat® radiators
– EPX panel heaters
– RXPW4 controller
– SCx cylinder
– Solar hot water
14-15
Document scope
The Government last updated Part L of the Building
Regulations for England and Wales in April 2006.
There are 4 approved documents to support the regulations:
Part L1A - Conservation of fuel and power for new dwellings
Part L1B - Conservation of fuel and power for existing dwellings
Part L2A - Conservation of fuel and power for new buildings other than dwellings
Part L2B - Conservation of fuel and power for existing buildings other than dwellings
This document is designed to provide guidance on using electric heating solutions
for Part L1A 2006 up to and including 2010 for the following dwelling types:
Apartments / Flats / Smaller Terraced Homes.
2010 to 2013
Further change to Part L are due to take place in 2010 and this will require a
further reduction of 25% in energy use. Solution for achieving compliance for
2010 to 2013 is also modelled within this document. Further Specifier Guides on
achieving Code for Sustainable Homes Level 3 and above are also available.
For more details please see back cover.
3
About Dimplex
Dimplex is the brand leader in electric space and
water heating, offering a selection of over 400
products within the sector – the widest in the world.
With a heritage of 60 years, Dimplex has an
unmatched reputation for quality and reliability
and unrivalled experience and resource, with
its own design team and R&D facility to ensure
the company remains at the forefront of product
development and innovation.
A critical aspect of our success is built upon a policy of continuous
investment in every area of the business – from product development
right through to customer service. An ongoing programme of research,
together with careful monitoring of customer needs and design trends
helps direct this investment. No-one else in the industry invests more in
developing products that constantly set new standards, with a central
design facility on the outskirts of London and product category focused
research teams at factories in the UK and Europe. Our investment in
people, training and resources is reflected in the quality of our products
and the standard of our before and post sales service. As part of our
commitment to product quality, we also apply stringent controls to every
part of our manufacturing process and are ISO9002 approved.
4
Part L1A 2006 –
new domestic dwellings:
Overview
The 2006 regulations were designed to reduce
energy use from new buildings by at least 20%
over the 2002 regulations.
A key change from the 2002 regulations is that compliance is now based
upon whole building carbon emissions, with the former compliance
methodologies (elemental, target u-value and carbon index) now scrapped.
This important change means that building designers must now take a more
holistic approach to the design of their buildings, considering the impacts of
both the constructional elements as well as those of the energy using services
(heating, hot water, lighting and ventilation). Air tightness also now has an
additional impact, with minimum standards now applying which will have to
be confirmed on building completion by sample pressure testing.
A new version of SAP (Standard Assessment Procedure) was produced to
enable the necessary calculations to be carried out and includes a TER and
DER calculator.
The TER (target carbon emissions) level is calculated using a 'notional'
building of the same floor area / shape / etc. as the one being designed,
with default element u-values and heating, hot water and ventilation systems
applied so a carbon emissions figure can be calculated.
A carbon emissions improvement factor and allowance factor dependent on
the heating fuel type are then applied to produce the TER target, expressed
in kgCO2/m2/yr.
The DER (predicted dwelling carbon emissions) figure is calculated by
applying the proposed building details (floor area / shape / element
u-values / air tightness / heating / hot water / ventilation system / etc.) to SAP,
which will produce a predicted carbon emissions figure for the buildings.
Improvements to the building fabric elements or building services
types/efficiencies improve the DER, allowing compliance to be achieved.
The DER must not exceed the TER.
5
Part L1A 2006 –
new domestic dwellings:
Block assessment method
For buildings containing multiple dwellings such
as flats, it is permissible to use a whole block
methodology to demonstrate compliance. This
is done by calculating the individual TER / DER
for each dwelling and calculating the floor area
weighted average TER and DER for the block.
This has the distinct benefit that better performing units within the block,
for example mid floor flats with less exposed surface areas, can be used to
trade off against ground floor and top floor flats, meaning it is not necessary
to achieve compliance for every single dwelling, only the overall block.
This also provides the ability for innovative approaches to compliance to
be taken, for example installing solar water heating for the top floor flats,
providing an overall carbon saving benefit for the complete block. This and
other compliance options are covered in more detail in the SAP.
Note: The Block Assessment Method does not apply post 2010.
Reducing building CO2
(not just heating appliances)
Part L focuses on reducing carbon emissions and looks at how the building
functions as a whole. As a result the insulation and building fabric may
have to be improved, whatever the heating system specified. The diagram
opposite shows eight key areas where simple adjustments can me made to
the building design to reduce the TER.
6
Heat communal areas
Basic fabric improvements
For multiple occupancy dwellings like flats, specifying a low
The notional building used to calculate the TER assumes
level of background heating in the communal areas, such as
u-values at the 2002 elemental level, i.e. walls at 0.35,
hallways, allows these walls to be disregarded from the SAP
glazing at 2.0, etc. Improving these by a modest amount to
calculation as they no longer represent a heat loss.
reduce the energy required to heat the building, e.g. walls to
Reduce hot water cylinder capacity
0.3, glazing to 1.8, provides an immediate carbon dioxide
The cylinder efficiency is not affected by improvements in
emissions saving.
the thermal performance of the building fabric. However,
Reduce glazed area
the Building Regulations’ TER calculation assumes a 170L
The Building Regulations’ TER calculation assumes glazing
cylinder capacity, so reducing this provides a carbon saving.
occupies up to 25% of the floor area. In practice, however,
Include Solar Hot Water
the glazed area for flats is generally much lower than this,
Solar hot water provides up to 60% of a property’s water
reducing the level of improvement that specifiers need to
heating needs. For multiple dwelling developments (such
achieve.
as flats) it’s possible to use whole block methodology to
Improve controllability
demonstrate compliance with Part L. Solar hot water can
The more controllable the heating appliance, the lower
be fitted to the top floor apartments to give a lower carbon
the carbon emissions. Dimplex electronic panel heaters
dioxide emission, which is then traded off against the lower
or DuoHeat radiators score highly in SAP due to their
floors which may have higher emission rates. When inputting
controllability and energy efficiency.
the data into SAP, using the Dimplex quoted net collector
area and the (a1) and (η0) figures can have a marked
improvement on the DER.
Reduce air permeability
Improving air tightness beyond the mandatory level reduces
emissions at relatively low cost. Electric heating has an
Include mechanical ventilation with heat recovery
advantage here as it reduces the quantity of pipes/holes in
The use of a high efficiency mechanical ventilation system
the building fabric. Reducing this too far may make MVHR
with the ability to recover waste heat helps to reduce carbon
mandatory.
emissions by recovering heat that would have been lost.
7
Part L1A 2006 –
Dimplex electric heating solution
The minimum functional and performance requirements for electric heating systems under
Part L are listed in the governments Part L Domestic Heating Compliance Guide, but are
categorised as follows:
•
Electric Panel Heaters
•
Storage Heaters & Integrated Storage/Direct Systems
•
Electric Hot Water
Electric Panel Heaters
The Domestic Heating Compliance Guide states that:
“Local time and temperature control integrated into product or connected separately to the product.” Dimplex offers a wide range of panel heaters including the PLX range which feature integrated
time/temperature control, while the EPX range offers integrated time/temperature control or can be
controlled separately via a wall mounted controller
Storage Heaters & Integrated Storage/Direct systems
The Domestic Heating Compliance Guide states that:
“Charge control: Automatic control of input charge should be provided
Temperature control: Controls for adjusting the rate of heat release from the appliance should be
provided, such as an adjustable damper or some other thermostatically controlled means.”
Dimplex XLS, CXLS and FXL storage heater ranges all meet these requirements, incorporating fully
automatic charge controls and provide adjustable output controls. Dimplex DuoHeat radiators also
provide highly sensitive electronic input charge and output controls, in addition to providing fully
thermostatic output control over the radiant element.
Electric Hot Water
The Domestic Heating Compliance Guide states that:
“Separate timing control of the hot water requirement.”
The Dimplex SCx cylinders are able to meet this requirement.
Dimplex Renewables
Building designers are increasingly being encouraged to integrate renewables into their
development plans by local planning authorities seeking to fulfill their PPS22.
Using renewable technology, such as Dimplex solar thermal panels or heat pumps also helps
significantly to reduce the DER carbon emissions. It therefore makes sense to take advantage of these
planning requirements by considering renewables as part of the buildings energy saving strategy.
8
For example this might be achieved by providing solar panels for domestic hot water heating,
while continuing to specify low cost electric space heating, reducing CO2 levels and meeting the
renewables contribution targets at the same time.
This document will provide an example of a new dwelling using Dimplex Solar Thermal with electric
heating to demonstrate compliance.
Advantages of using Electric Heating to
Achieve Compliance
Designers taking a wider view of the buildings overall sustainability are also interested in
considering lifetime system ownership costs. Electric heating systems do not require any regular
maintenance or annual safety inspections. In addition, the efficiency of electrical resistance heating,
which can be considered to be 100% at the point of use, does not deteriorate over the products
lifetime, unlike centralized boiler systems, which lose efficiency sludge and particulates are circulated
through the heat exchanger and distribution system.
A significant cause of air leakage are the number of building services such as pipes, ducts and
holes which penetrate the building fabric and are insufficiently sealed to prevent unnecessary air
leakage.
Electric heating systems require no pipework or flues to penetrate the building shell and therefore
allowing a high level of air tightness to be achieved more easily
Part L Energy Strategy
In order to meet the 20% DER reduction target for 2006, improvements over the requirements of
Part L1A 2002 need to be made, both in terms of building fabric and efficiency of the services.
The following outlines typical challenging but achievable criteria, which when used in combination
as a holistic approach to energy saving can meet the requirements of Part L1A 2006.
Electric Heater scores within SAP
The table below identifies the ratings of electric heating appliances with SAP:
System
Efficiency
Type
R
Convector Storage (Dimplex CLX)
100%
4
0.25
Fan Storage (Dimplex FXL)
100%
3
0.50
Fan Storage + Celect Control
100%
3
0.75
Dimplex DuoHeat®
100%
2
0.75
Panel Heaters (Dimplex PLX/ EPX)
100%
1
1.00
9
Scenario: Complying with Part L 2006, utilising
electric heating solution in multiple dwellings
Development type: 6 x 52m² apartments: 2 x Ground Floor Flats,
2 x Middle Floor Flats and 2 x Top Floor Flats
Flatted Development: 6 x 52m² apartments: 2 x Ground Floor Flats: 2 x Middle Floor Flats: 2 x Top Floor Flats
Fabric Notes
Walls
0.30a
U-values W/m K
Roof
0.11
Ground Floor
0.25
Doors
1.80
Windows
1.80
Thermal bridging
0.08
Ventilation
Air tightness (m /m /hr@50Pa)
7.0
Standard Fans
2
3
2
Heat Loss
Parameter
Achieved
Heating System
Accredited construction details
1 x Kitchen
1 x Bathroom
Not Applicable 2006
Integrated
Storage/Direct
Controls
Room Thermostats
+ Central Programmes
Water Heating
Direct electric via
immersion + solar
to top floor flats
100% efficiency selected in SAP
Dimplex SCx unvented cylinders,
manufacturers stated standing
losses applied
Ground + Middle Floor Flats: SCX150d
Top Floor Flats: SCX175sd + 2 m² Solar
East/West Orientation
10% Secondary
Heating
Electric
Low energy lighting
Internal
Only 25% benefit is SAP
CO2 Emissions
Flat Type
Ground Floor
Block Assessment TER
37.1
Block Assessment DER
36.9
Middle Floor
Top Floor
Dimplex Heating System
DuoHeat Radiators & EPX Panels Heaters
Living Room – Duo500n
Hall – Duo300n
Bathroom – EPX500
Bedroom 1 – EPX750
Bedroom 2 – EPX500
Controls
RXPW4
Domestic Hot Water
Ground/Middle Floor Flats Individual water storage cylinders SCx150d,1 per apartment in each apartment, heated by off peak electric immersion with boost immersion 10
Top Floor Flats
SCX175sd
Solar 2m²
Scenario: Complying with Part L 2006, utilising
electric heating solution in terraced homes
Development type: 70m² Terraced House
Flatted Development: 6 x 52m² apartments: 2 x Ground Floor Flats: 2 x Middle Floor Flats: 2 x Top Floor Flats
Fabric Walls
0.35
U-values W/m K
Roof
0.16
Ground Floor
0.20
Doors
1.80
Windows
1.80
2
Thermal bridging
0.08
Notes
Accredited
construction details
Ventilation
Air tightness
(m /m /hr@50Pa)
Standard Fans
1 x Kitchen
1 x Bathroom
3
10.0
2
Heat Loss
Parameter
Achieved
Not Applicable 2006
Heating System
Integrated Storage/Direct
Controls
1 x WC
100% efficiency
selected in SAP
Room Thermostats
+ Central Programmer
Water Heating
Direct electric via
immersion + solar
10% Secondary Heating
Electric
Low energy lighting
Internal
50%
CO2 Emissions
TER
29.72
DER
28.97
Dimplex SCx 175sd
unvented cylinders,
60mm insulation
Dimplex Heating System
DuoHeat Radiators & EPX Panels Heaters
Living Room – Duo500n
Hall – Duo400n
WC – EPX500
Bathroom – EPX500
Bedroom 1 – EPX750
Bedroom 2 – EPX500
Controls
RXPW4
Domestic Hot Water
Individual water storage cylinders heated
by off peak electric immersion with boost immersion
SCx175sd Solar 2m² South East / South West Orientation 11
Scenario: Complying with Part L 2010, utilising
electric heating solution in multiple dwellings
Development type: 6 x 52m² apartments: 2 x Ground Floor Flats,
2 x Middle Floor Flats and 2 x Top Floor Flats
Flatted Development: 6 x 52m² apartments: 2 x Ground Floor Flats: 2 x Middle Floor Flats: 2 x Top Floor Flats
Fabric Walls
0.21
U-values W/m K
Roof
0.11
Ground Floor
0.11
Doors
1.5
Windows
1.5
2
Thermal bridging
0.08
Notes
Accredited
construction details
Ventilation
Air tightness (m3/m2/hr@50Pa)
6.0
Standard Fans
1 x Kitchen
1 x Bathroom
Heat Loss
Parameter Achieved
Middle Floor 1.07
Heating System
Ground Floor & Top Floor 1.23
Integrated Storage/Direct
Controls
100% efficiency
selected in SAP
Room Thermostats
+ Central Programmer
Water Heating
Direct electric via
immersion + Solar
Dimplex SCx 175sd unvented cylinders, manufacturers stated
standing losses applied
10% Secondary
Heating
Electric
Low energy lighting
Internal
75%
External
100%
CO2 Emissions
TER
G/F 38.90
M/F 33.89
T/F 38.05
DER
G/F 28.04
M/F 23.91
T/F 27.99
Improvements %
G/F=25.35%
M/F=29.45%
T/F=26.44%
G/F = Ground Floor;
M/F = Middle Floor;
All communal and security lighting
T/F = Top Floor
Dimplex Heating System
12
DuoHeat & Panels
Living Room – Duo400n
Hall – Duo300n
Bathroom – EPX500
Bedroom 1 – EPX750
Bedroom 2 – EPX500
Controls
RXPW4
Domestic Hot Water
Ground Floor
Middle Floor Top Floor
Individual water storage cylinders in each apartment, heated by off peak electric immersion with boost immersion SCx175sd Solar 2m²
East/west orientation
SCX175sd
Solar 4m²
SCX175sd
Solar 4m²
Scenario: Complying with Part L 2010, utilising
electric heating solution in terraced homes
Development type: 70m² Terraced House
Flatted Development: 6 x 52m² apartments: 2 x Ground Floor Flats: 2 x Middle Floor Flats: 2 x Top Floor Flats
Fabric Notes
Walls
0.21
U-values W/m K
Roof
0.11
Ground Floor
0.11
Doors
1.5
Windows
1.5
Thermal bridging
0.08
Ventilation
Air tightness (m /m /hr@50Pa)
5.0
Standard Fans
1 – Kitchen
2 – Bathroom
2
3
2
Heat Loss
Parameter Achieved
1.01
Heating System
Integrated Storage/Direct
Controls
Accredited construction details
3 – WC
100% efficiency selected in SAP
Room Thermostats
+ Central
Programmer
Water Heating
Direct electric via
immersion + Solar
Dimplex SCx 175sd unvented
cylinders, manufacturers
stated standing losses applied
10% Secondary Heating
Electric
Low energy lighting
Internal
75%
External
100%
CO Emissions
TER
29.72
DER
22.17
Improvement
25.40
2
(Ene1) 5
Primary Heat Source
DuoHeat & Panels
Living Room – Duo500n
Hall – Duo400n
WC – EPX500
Bathroom – EPX500
Bedroom 1 – EPX750
Bedroom 2 – EPX500
Controls
RXPW4
Domestic Hot Water
Individual water storage cylinders heated
by off peak electric immersion with boost immersion
SCx175sd Solar 4m² South East / South West Orientation
13
PRODUCT OVERVIEW
DuoHeat® radiators
• Patented ‘smart’ heat manager automatically controls
output level from each heat source, optimising
controllability and economy*.
• Single, simple to use and understand electronic user
control, with child lock facility:
– Electronic room temperature control allowing user adjustment of heater output.
– User configurable electronic automatic input charge regulator.
• Savings of up to 10% compared with traditional off-peak
electric heating systems, recognised by SAP2005.
• Compatible with Dimplex 4-zone, multi-heater
programmers.
• Stylish, slim-line with concealed grille.
• Heat output provided by a combination of off-peak
and standard rate electricity sources.
• Pre-wired electrical connections.
• Simple, secure wall fixings and snap fit feet.
• Easy-fit front panel connections.
• Compatible with all off-peak tariffs.
Please note: Information provided relates to ‘n’ range models only,
not previous ‘i’ range. * Patent number GB2384300
Model Duo400n
EPX electronic panel
convector heaters
• Electronic thermostatic control, providing room
temperature stability to +/-0.3ºC.
• Range of optional plug-in electronic timer modules,
including: – 24 hour digital timer
– Single-zone pilot wire programmer
– Runback timer
• Compatible with Dimplex 4-zone, wall mounted
pilot wire and mains borne signalling multi-heater
programmers.
• Stylish design with forward facing louver grille for
optimum heat circulation.
• Aesthetics to complement DuoHeat radiators, with pure
white finish.
• Pre-set background temperature at 5ºC below
thermostat setting.*
• Splash-proof (IPX4) rated, for use in bathrooms or wet
areas.
• Completely silent operation.
• Simple detachable wall bracket for easy installation.
Model EPX1500
*When connected to a programming unit supporting setback feature.
RXPW4
• Wall mounted, mains powered units • Installer configurable option to allow switching between
Comfort/Setback modes, Comfort/Off modes or Comfort/Frost protection modes • Manual programme
over-ride facility, with automatic return to programme at next timed change • Continuous Comfort,
Setback, Frost protection and Off modes* • Holiday (time absence) mode • Easy to install and configure
• RXPW4 pilot wire programmer can be used with RXPWIF interface unit to control
Model RXPW4
ancillary appliances, such as towel rails or hot water systems.
14
Note: For MBS option, RX9913 receiver cassettes are required for each panel heater or
RX03002 for each DuoHeat radiator. *Off mode not applicable for DuoHeat.
PRODUCT OVERVIEW
SCx unvented
cylinders
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
60mm CFC free insulation reduces heat loss.
Mains pressure hot water.
Fast filling baths.
Powerful invigorating showers.
Simultaneous supply of water to all bathrooms. No cold water storage tank required, freeing up
valuable living space.
Long life low maintenance hot water supply.
Backed by a big name in domestic heating.
Option of a brushed stainless steel outer case.
Duplex steel inner cylinder with 25 years guarantee.
Internal expansion for quick easy installation.
Tough plastic leather grain external coating resists
scratching.
No anode – reduces service requirements.
CFC free foam injected insulation.
3kW incoloy 825 immersion(s) for longer life.
Light-weight for easy handling to site.
Water inlet diffuser prevents cold and hot water mixing.
SCx with optional immersion cover
Solar package
• Combines all the necessary components into correctly
matched packages for a range of standard installations.
• Designed to make specification and purchase easy.
• Every component carefully selected for its quality and
suitability for the UK climate.
Roof kit packages
• Choice of 2m2, 4m2 and 6m2 collector kits.
• On roof mounting for plain tile, corrugated tile or slate roofs.
• Integrated roof mounting for tile or slate roofs.
• Free standing panels for flat roof’s or ground level mounting.
Hydraulic packages
•
•
•
•
Pump station.
Control unit.
Heat transfer fluid.
Expansion vessel and fixing kit.
Range of cylinders
Available with single coil and dual immersions for direct
electric systems or dual coils for use with a secondary heat
source (such as a boiler). 25 years cylinder warranty.
Sizes available:
• 175 Litre
• 215 Litre
• 255 Litre
• 305 Litre
15
ROUTEONE
Compliance strategies
Your guide to our specifiers guides:
Guide 1 Electric Heating Solutions Part L
up to and including 2010 –
Flats and Terraced Housing
Guide 2 Achieving Code Level 3 using
Electric Heating – Flats and
Terraced Housing
The Dimplex Range
Dimplex offers the widest range of electric space, water
heating and renewable solutions in the UK. In addition to this
publication, we have a number of more focused brochures.
Choose from:
Range
brochure
Heat pumps
brochure
Solar heating
brochure
Water heating
brochure
Commercial
brochure
Outdoor heating
brochure
Guide 3 Achieving Code Level 3 using
Heat Pumps – Flats
Guide 4 Achieving Code Level 3 using
Heat Pumps – Housing
Guide 5 Achieving Code Level 4 using
Heat Pumps – Flats
Guide 6 Achieving Code Level 4 using
Heat Pumps – Housing
Portables
brochure
Fires brochure
For a copy of one of the above guides or to discuss a project in more detail, please:
visit: www.dimplex.co.uk/routeone
phone: 01489 773336
email: marketing@dimplex.co.uk
Alternatively our heating design team are also available at the end of a phone to help you
achieve compliance or we can arrange for one of our key account managers to visit you.
Dimplex, Millbrook House, Grange Drive, Hedge End, Southampton, SO30 2DF
For Northern Ireland please contact – Glen Dimplex N I Limited, 5 Charlestown Avenue, Charlestown Industrial Estate,
Charlestown Road, Craigavon, BT63 5ZF. Telephone: 02838 337317
Designed and produced by CCA Marketing Limited, Christchurch (Bournemouth). www.cca-marketing.com
D1382/0209
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