Standard Assessment Procedure (SAP 2009)

Green Deal Occupancy Assessments (based on SAP 2009)

Part of the Green Deal process is an occupancy assessment that takes account of the occupants’ current use of the property in order to inform about the impact of improvement measures for the specific household. SAP calculations are modified for this purpose as described in the document below. This specification, currently in use for Occupancy Assessments, will be superseded later in 2014 by a new version; for details see here

Download:

Occupancy Assessment (version October 2012) (minor revisions December 2012)

Download the current list of approved OA software (list dated 5 April 2013)

Reduced Data SAP from 1 April 2012

RdSAP has been revised so as to include additional collected data and additional recommendations for improvement. It is known as RdSAP 2009 version 9.91 and applies to all EPCs produced from 1 April 2012 in England, Wales and Northern Ireland, and from 1 October 2012 in Scotland. The revised EPCs support Green Deal, introduced in England, Wales and Scotland in October 2012.

RdSAP 9.91 improved the energy assessment of dwellings and provides better information on benefits from improving the energy performance of a dwelling. This was done as part of the continuing improvements of the methodology for energy assessments and to support the delivery of Green Deal policy. More information on the Green Deal is available on the DECC website www.gov.uk/green-deal-energy-saving-measures

Downloads

RdSAP 9.91 Summary of changes

RdSAP 9.91 Appendix S (RdSAP specification)

RdSAP 9.91 Appendix T (improvement measures)

RdSAP conventions

The current RdSAP conventions (updated December 2012) can be downloaded here.

Other SAP technical documents

These papers relate mainly to the previous consultation on SAP 2009. They can be downloaded in PDF format.

Boilers:

• STP09/B01 Changes to the treatment of boilers (gas and oil) in SAP 2009

• STP09/B02 Energy Balance Validation: Investigation of the residual energy of thermal efficiency tests on gas and oil boilers

• STP09/B03 Revision to the SEDBUK procedure for oil boilers

• STP09/B04 Analysis of results from energy performance tests on combi boilers 2008

• STP09/B05 A meta-analysis of boiler test efficiencies to compare independent and manufacturers’ results

• STP09/B06 Boiler efficiency for community heating in SAP

• STP09/B07 Efficiency tests of water heating by regular and combi boilers 2009

• STP10/B08 Laboratory tests on gas and oil boilers 2010

Domestic hot water:

• STP09/DHW01 Analysis of the EST’s domestic hot water trials and their implications for amendments to BREDEM and SAP

Auxillary energy use and internal gains

• STP09/AUX01 Review of auxiliary energy use and the internal heat gains assumptions in SAP

Occupancy and floor area:

• STP09/NOFA01 A review of the relationship between floor area and occupancy in SAP

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

Scotland Section 7 calculator for water heating

Spreadsheets for SAP assessors

These spreadsheets can be used in conjunction with SAP software for the situations indicated.

Multiple wind turbines (SAP 2005 and SAP 2009)

When there is more than one wind turbine with differing hub height or rotor diameter.

Download spreadsheet for multiple wind turbines

Two photovoltaic types (SAP 2005)

When there are two PV types with differing kWp, orientation, pitch or shading.

Download spreadsheet two PV types

Multiple MEV systems (SAP 2005 and SAP 2009)

When there are two centralised MEV systems, or a centralised MEV system and decentralised MEV.

Download spreadsheet for multiple MEVs

Community systems with multiple fuels (SAP 2009, Scotland)

When there is a community heating scheme using more than one fuel and the SAP software says that the spreadsheet must be used.

Download spreadsheet for Scotland community TER

Flue Gas and Waste Water Heat Recovery (SAP 2009)

If the SAP software does not handle these items, the following spreadsheets can be used and the resulting energy savings entered into the SAP software as a Special Feature (Appendix Q).

Download spreadsheet for FGHRS (v 1.08a, 4 Feb 2011)
Download spreadsheet for WWHRS (v 1.08a, 30 Jun 2011)