Innovation for domestic applications

Product data that supports the UK’s National Calculation Methodology (NCM) for energy rating dwellings (SAP/RdSAP) is held in either the Product Characteristics Database (PCDB) or the SAP Appendix Q database. Since the incorporation of new technology types in the PCDB can only be undertaken when new versions of SAP are issued, product data for new technology types are held initially in the SAP Appendix Q database.

Appendix Q of SAP provides a means whereby validated individual branded product performance information can be accessed and used as an adjunct to the SAP calculation. A product’s performance information is determined by testing against a specification that has been agreed by the Department for Business, Energy & Industrial Strategy's (BEIS) NCM contractor, the relevant manufacturer(s) and industry sector representatives. Product data that is listed in the SAP Appendix Q database may migrate to the PCDB when a new version of SAP, incorporating the relevant calculation process, is released. The data will also remain in the Appendix Q database until obsolete versions of SAP have been withdrawn or where it is impractical to include it within the PCDB.

For applicable technologies that purport to enable domestic energy savings, it may be possible to recognise these energy savings for the purposes of SAP assessments via Appendix Q. To apply for recognition of a new technology category (Appendix Q) within SAP, please visit the 'Apply for recognition of a new technology' page.

Changes to the UK’s National Calculation Methodology (NCM) for energy rating dwellings for the purposes of recognising new technologies will be undertaken in accordance with the Mission Statement for the development of SAP/RdSAP:

 

Mission Statement for the development of SAP/RdSAP

'The National Calculation Methodology for energy rating of dwellings (SAP/RdSAP) will be maintained and developed in support of Building Regulations and other Government policies, such as those that facilitate energy efficiency improvements.

SAP and the provision of SAP assessments must be sufficiently robust, providing consumer protection and minimising the risk that anticipated fuel bill savings are not achieved.

To achieve this, SAP must be reactive to a changing evidence-base and continuously seek to enhance accuracy. SAP must also support the recognition of innovative energy saving technologies, where relevant, whilst maintaining a robust and impartial assessment that preserves simplicity to minimise assessment cost.'

 

Energy Efficiency vs Energy Reduction Measures

Energy Efficiency Measures are defined as those that provide the same level of building service whilst reducing dwelling energy use. For example a condensing boiler enables the same level of heating service to be provided with less energy than a non-condensing boiler.

Energy Saving Measures are defined as those that help occupants use less energy when they are willing to tolerate a lower level of building service. For example, a temperature controller may allow a heating system to adjust internal temperatures below standard SAP assumptions. These measures are not recognised by SAP, and depend on the extent to which occupants are willing to use them.

 

SAP Scientific Integrity Group (SAPSIG)

In certain instances, applications for new technologies will be reviewed by the SAP Scientific Integrity Group to ensure the NCM Contractor maintains the integrity of SAP (refer to http://www.sapsig.bre.co.uk)

The purpose of the SAP Scientific Integrity Group is to maintain and protect the integrity, coherence and impartiality of the SAP model. SAP is an analytical model of the energy performance of dwellings in the UK, taking into account technical characteristics of the materials, products, and building services of which they are comprised.

 

Appeal process

The Building Research Establishment Ltd (BRE) are contracted to maintain and develop the National Calculation Methodologies for Energy Rating of Dwellings (SAP and RdSAP) on behalf of the UK’s Department for Business, Energy & Industrial Strategy (BEIS). Where an application for recognition of a new technology within SAP (and RdSAP) is refused by BRE, whether in consultation with SAPSIG or not, the applicant has the right to appeal. In such cases the applicant must inform BRE that they wish to do so, whereby their case will be forwarded to BEIS for review.

If the applicant feels they have received poor service in the handling of their complaint from a Government Department, then they can contact the Parliamentary and Health Service Ombudsman. Contact details are available from: www.ombudsman.org.uk