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EN 17423 (on reporting Prim.En.Factors + CO2)

Energy performance of buildings – Determination and reporting of Primary Energy Factors (PEF) and CO2 emission coefficient – General Principles, Module M1-7

CEN standards database

 

Geographical scope:
Europe
Theme:
EP indicators, requirements or ratings
Published date:
Nov. 15, 2020
Topics:
  • Overarching
Responsibility:
CEN and/or ISO

Abstract

This document provides a transparent framework for reporting on the choices related to the procedure to determine PEFs and CO2 Emission coefficients for energy delivered to and/or exported by the buildings as described in EN ISO 52000-1:2017. Exported PEFs and CO2 Emission coefficients can be different from those chosen for delivered energy.
This document can be considered as a supporting/complementing standard to EN ISO 52000-1, as the latter requires values for the PEFs and GHG Emissions factors to complete the EPB calculation.

Articles

REHVA Journal, Vol. 57, Issue 1, Feb. 2020, Johann Zirngibl, Primary Energy Factors and CO2 emission coefficient for a correct estimation of the real impact of building on energy and climate change

REHVA Journal, Vol. 56, Issue 4, Àug. 2019, Jaap Hogeling, prEN 17423 Energy performance of buildings – Determination and reporting of Primary Energy Factors (PEF) and CO2 emission coefficient – General Principles, Module M1-7

 

Why is this standard important?

By: Johann ZIRNGIBL (CEN TC371/WG1)

The values of primary energy factors (PEFs) and CO2 Emission factors have a strong impact on the expression of the energy performance of buildings as they are the multiplication factors for the whole calculated building energy use according to EN ISO 52000-1. Primary energy is the key indicator for the energy performance of building requested by the European Energy Performance of Building Directive (EPBD).

The quality and transparency of the PEF calculations is key for the:

Therefore, there is a need for transparency related to the choices that have been made to determine the content of the PEF and the related CO2 emission factors. The purpose of EN 17423 is not to standardize the value of the PEF or CO2 emission factors, but to make clear which assumptions were used to determine these factors.
Annex B of EN ISO 52000-1 provides some first information on assumptions used. EN 17423 enlarges the assumptions, for example by several internationally recognized conventions for the primary energy content of electricity from renewable or nuclear sources, biogenic carbon, energy exchanges between geographical perimeters.

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