Non Domestic EPC Conventions for England & Wales Issue 7.1
Below is a copy of the conventions document, which is circulated by the Accreditation Schemes to their Non-Domestic Energy Assessors (NDEAs). These conventions apply to assessments in England and Wales only. They have been agreed by the Non-Domestic Energy Performance Certificate (NDEPC) Conventions Group and approved by DLUHC.
Commercial EPC EW Conventions Issue 7.1 - v2.0 (17092018) click here to download
If an NDEA has any questions about the conventions, they must feed them back to their respective Accreditation Scheme.