BS EN 17423:2020

This standard BS EN 17423:2020 Energy performance of buildings. Determination and reporting of Primary Energy Factors (PEF) and CO2 emission coefficient. General Principles, Module M1-7 is classified in these ICS categories:

• 13.040.01 Air quality in general
• 91.120.10 Thermal insulation of buildings

This document provides a transparent framework for reporting on the choices related to the procedure to determine primary energy factors (PEFs) and CO₂ emission coefficients for energy delivered to and exported from the buildings as described in EN ISO 52000-1.

This document specifies the choices to be made to calculate the PEF(s) and CO₂ emission coefficients related to different energy carriers. PEFs and CO₂ emission coefficients for exported energy can be different from those chosen for delivered energy.

This document is primarily intended for supporting and complementing EN ISO 52000-1, as the latter requires values for the PEFs and CO₂ emission coefficients to complete the EPB calculation. But it can also be used for other applications.

Table 1 shows the position (marked by “X”) of this document within the modular structure as set out in EN ISO 52000-1.

The modules represent EPB standards, although one EPB standard may cover more than one module and one module may be covered by more than one EPB standard, for instance a simplified and a detailed method respectively.