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Standard Assessment Procedure SAP 10
This site hosts documents and information relating to version 10 of the Standard Assessment Procedure SAP 10.
SAP 10 Overview
SAP 10.2, in conjunction with the 2019 edition of BRE 443, is to be used for Building Regulations purposes in England from June 2022 and in Wales from November 2022. Other administrations are expected to adopt it soon as part of their regulatory updates.
The specification for the latest edition of Reduced data SAP, RdSAP10, is also given below. The fuel costs and fuel cost deflator (Table 32) and the specific SAP rating equations (Section 20 of the specification) are still under consideration, and these will be provided as soon as possible in a final version of the document. If you have any queries about this specification please direct them to rdsap-10@bregroup.com.
Only approved SAP software can be used for official purposes.
A list of approved software is shown under ‘downloads’, below.
Downloads
RdSAP10 specification (13/02/24)
SAP 10.2 specification (11/04/2023)
Current list of approved SAP 10 software
Briefing note on primary energy factors used in SAP 10 (01/10/2019)
SAP 10 Technical Paper S10TP-15: CO2 and Primary Energy Factors for SAP Version 1.1 (25/11/2020)
MV MVHR Intermittent fans calculator October 2022
SAP conventions version 9 December 2022
SAP 10 Conventions version 10_0 applicable to SAP10_2
SAP 10 Conventions version 10 Dec 2022 amended July 2023
SAP 10 technical papers can be found here.
Earlier versions of SAP 10 related documents can be found here.
Older versions of SAP 10 related documents
The following documents are development/consultation drafts or superseded versions of documents related to SAP 10. These should not be used in relation to live assessments, but are held here in case needed for reference purposes.
SAP 10.2 specification (17/03/2022)
SAP 10.2 specification (03/02/2022)
SAP 10.2 specification (17/12/2021)
SAP 10.2 specification (15/12/2021)
SAP 10.2 specification (20/08/2021)
Standard Assessment Procedure SAP 10
The following papers describe changes made in SAP 10.2, relative to SAP 2012.
S10TP-02 – Chimneys and flues – V1_2
S10TP-03 – Heat interface units – treatment of losses V1_0
S10TP-04 – Change to Appendix H to include solar space heating – V1_3
S10TP-05 – Treatment of thermal bridges – V1_2
S10TP-07 – PV self-use factor calculation_V1_4
S10TP-12 – Seasonal efficiency of condensing boilers – V1.2
S10TP-13 – Mechanical ventilation system assumptions – V1.1
S10TP-17 – Monthly factors for CO2 emissions and primary energy – V1.0
Scotland Building Regulations Section 7: Sustainability
The spreadsheet below is used for assessing the aspect of energy for water heating within the higher levels (silver and gold) of the Scottish building standard 7.1