Guidance

Method for calculating the energy performance of buildings: notice of approval

Approved methodologies that can be used to produce Energy Performance Certificates and Display Energy Certificates.

Document

Notice of Approval of the methodology of calculation of the energy performance of buildings in England and Wales

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Detail

This publication documents the approved methodologies and software programs that can be used to produce Energy Performance Certificates (EPCs), Display Energy Certificates (DECs) and Air Conditioning Inspection Reports (ACIRs).

This notice replaces the notice of approval published in October 2008.

In respect of air conditioning inspection reports, the software is approved as fit for commercial use in its current state and form to generate an inspection report.

The approved methodologies and software programs continue to take effect until withdrawn by the Secretary of State or superseded.

Building Regulations 2010: notice of approval

A new notice of approval came into effect on 6 April 2014, which sets out the national approved calculation methodologies for calculating the energy performance of buildings in England, and for certain buildings in Wales, for the purposes of regulations 25 and 29 of the Building Regulations 2010.

Earlier versions of the methodologies may continue to be used in respect of building work started on site before 6 April 2014; or where a notification of building work has been given before 6 April 2014 and the building work is commenced on site before 6 April 2015.