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Technical Bulletin TB24 All RdSAP Conventions

October 2016 TB24 All RdSAP Conventions Technical Bulletin TB24 All RdSAP Conventions Reproduction of this document in whole or in part is forbidden without the consent of: Elmhurst Energy Systems Ltd 16 St Johns Business Park Lutterworth Leicestershire LE17 4H Existing Dwellings Team: Opening hours: Monday to Friday 09:00 17:00 T: 01455 883 257 F: 01455 883 251 E: W: October 2016 Page 2 of 43 TB24 All RdSAP Conventions Contents Introduction .. 4 Use of RdSAP .

October 2016 Page 5 of 43 TB24 – All RdSAP Conventions v9.0 1.01 Use of RdSAP Originally released September 2009 & amended in January 2012, December 2012 & April 2015

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Transcription of Technical Bulletin TB24 All RdSAP Conventions

1 October 2016 TB24 All RdSAP Conventions Technical Bulletin TB24 All RdSAP Conventions Reproduction of this document in whole or in part is forbidden without the consent of: Elmhurst Energy Systems Ltd 16 St Johns Business Park Lutterworth Leicestershire LE17 4H Existing Dwellings Team: Opening hours: Monday to Friday 09:00 17:00 T: 01455 883 257 F: 01455 883 251 E: W: October 2016 Page 2 of 43 TB24 All RdSAP Conventions Contents Introduction .. 4 Use of RdSAP .

2 5 Flat or Maisonette .. 6 Address Close to England/Scotland border .. 6 Separate Part of a Dwelling .. 6 Not Self-Contained Separate Part of a Conventions Measurements and Geometry .. 7 .. 7 Precision of Lengths .. 7 Sheltered Wall Lengths .. 7 Habitable Room Count .. 8 Heated Habitable Room Basements .. 9 Rooms in the Roof .. 9 Rooms within a Mansard Roof .. 11 Whole Dwelling within a Roof .. 11 Porches .. 12 Mezzanine Floor .. 12 Vertical Extensions .. 13 More than Four Extensions.

3 13 Alternative Wall .. 14 Window Area (Doors).. 14 Glazed Area .. 15 Secondary Glazing .. 15 Sun 15 Basements .. 16 Store Rooms & Utility Rooms .. 16 Garages .. 16 Dwelling Adjacent to Commercial Premises .. 17 Wall Thickness (per building part) .. 17 Sloping Sites .. 18 Party Wall Lengths .. 19 Conventions Construction and Insulation .. 19 Cavity Wall Type .. 19 System Build Type .. 19 As Built (walls, floors, roofs) .. 20 Unknown Insulation (walls, floors, roofs) .. 20 Unknown Insulation Loft Insulation and Rafter 21 Age Band for Conversions.

4 21 Internal Wall Lining .. 22 Insulation Thickness .. 23 U-value Entry .. 23 October 2016 Page 3 of 43 TB24 All RdSAP Conventions External Doors .. 24 Windows (U-values and g-values) .. 24 Draught Proofing (of openable windows and doors) .. 24 Glazing Age .. 25 Age Band for Roof Room .. 25 High Rise Properties .. 26 Glazing Gap .. 26 Party Wall Construction in Loft Space .. 27 Conventions Main Heating .. 27 Heat Emitters .. 27 Storage Heaters .. 28 Boiler Not Present or Not Working.

5 28 Micro CHP .. 28 Definition of Community Heating .. 29 Heat Sources and fuel used by Community Heating .. 29 Two Main Systems .. 29 Liquid Biofuels .. 31 LPG Subject to Special Condition 18 .. 31 Straw Bales and Other Biomass .. 31 TRVs .. 31 Electric Underfloor Heating Electric CPSU ..32 Weather Compensators ..32 Time an Temperature Zone Central heating pump age .. 32 Heating Controller by Mobile App ..32 Conventions Secondary Heating .. 33 Secondary Heating .. 33 Open Fireplaces as Secondary Heaters.

6 33 Fuels for Solid Fuel Fires and Room 34 Conventions Water Heating .. 34 Dual Immersion with Single Tariff .. 34 Separate Boiler or Heat pump for DHW .. 34 Enclosed hot water cylinders .. 35 Hot water thermal store .. 35 Hot Water Cylinder Instantaneous Water Heater ..35 Electric Shower ..35 Conventions Lighting .. 35 Lights .. 35 Conventions Recommendations .. 36 Suppression of Recommendations .. 36 Mains Gas Available .. 37 Conventions Miscellaneous .. 37 Open Fireplace Count (for ventilation).

7 37 October 2016 Page 4 of 43 TB24 All RdSAP Conventions Documentary evidence .. 38 Lodgement of an Incorrect EPC .. 38 Cooling System 39 Photovoltaics .. 39 Flue Gas Heat Recovery .. 40 Wind Turbines .. 41 Waste Water Heat Recovery .. 41 Solar Water Heating .. 41 Hard to Treat Cavity Walls .. 42 Transaction Type .. 42 Tenure .. 42 Electricity Meters .. 43 Park Homes .. 43 Support .. 43 Introduction A background to the changes in RdSAP In order to promote consistency of EPCs across all Accreditation Schemes, the Department for Communities and Local Government (DCLG) has appointed a Conventions Group to regularly review various issues relating to the use of RdSAP and production of EPCs, and updates to the Conventions are periodically issued by DCLG.

8 The Conventions were first issued in Sept 2009 and this is the ninth issue. IMPORTANT NOTE PLEASE READ This document provides comprehensive guidance to all Conventions issued by DCLG to date. Please note the most recent Conventions have been highlighted/boxed in red. It has been agreed that the Conventions contained within this document should be implemented by all domestic energy assessors from 1st October 2016. There are no pending Conventions included, as per previous versions of this document.

9 Please note that the issue dates in this document are shown as the dates on which the Conventions were issued to accreditation schemes, not when they were implemented - this is to ensure that the dates contained in this Technical Bulletin match with those stated in the official Conventions document issued by DCLG. Members should also read and understand the updated Quality Assurance requirements ensuring all EPC evidence collected from 1st October 2016 complies with the new standards. Elmhurst s revised Minimum Evidence Requirements document is available for download in Access Elmhurst.

10 October 2016 Page 5 of 43 TB24 All RdSAP Conventions Use of RdSAP Originally released September 2009 & amended in January 2012, December 2012 & April 2015 New Build Dwellings ( On-Construction ): RdSAP should not be used for dwellings that are being or have been newly constructed. The full SAP Methodology should be used for newly built dwellings, including those dwellings created by conversion (change of use) of an existing building. When a new building is completed after the following dates (either as a newly constructed dwelling or as a conversion from a non-dwelling to a dwelling barn, chapel, mill, pub etc), it must have an On-Construction SAP Calculation and an On-Construction EPC produced.


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