EN 17423:2020

SLOVENSKI STANDARD
01-januar-2021
Energijske lastnosti stavb - Določanje in poročanje o faktorjih primarne energije
(PEF) in emisijskem koeficientu CO2 - Splošna načela - Modul M1-7
Energy performance of buildings - Determination and reporting of Primary Energy
Factors (PEF) and CO2 emission coefficient - General Principles, Module M1-7
Energieeffizienz von Gebäuden - Bestimmung und Berichterstattung von
Primärenergiefaktoren (PEF) und CO2-Emissionsfaktoren
Performance énergétique des bâtiments - Détermination et déclaration des facteurs
d’énergie primaire (PEF) et du coefficient d’émission de CO2 - Principes généraux,
Module M1-7
Ta slovenski standard je istoveten z: EN 17423:2020
ICS:
13.040.01 Kakovost zraka na splošno Air quality in general
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17423
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 13.040.01; 91.120.10
English Version
Energy performance of buildings - Determination and
reporting of Primary Energy Factors (PEF) and CO2
emission coefficient - General Principles, Module M1-7
Performance énergétique des bâtiments - Energieeffizienz von Gebäuden - Bestimmung und
Détermination et déclaration des facteurs d'énergie Berichterstattung von Primärenergiefaktoren (PEF)
primaire (PEF) et du coefficient d'émission de CO2 - und CO2-Emissionsfaktoren
Principes généraux, Module M1-7
This European Standard was approved by CEN on 4 October 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17423:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 8
3 Terms and definitions . 8
4 Symbols, subscripts and abbreviations. 10
4.1 Symbols . 10
4.2 Subscripts . 11
4.3 Abbreviations . 11
5 General description of the methods and choices . 12
5.1 Basic principles of the assessment methods . 12
5.2 Short description of the choices . 18
6 Set of different choices related to PEF and CO emission coefficient . 19
6.1 Choices related to the perimeter — Geographical perimeter . 19
6.2 Choices related to calculation conventions . 19
6.3 Choices related to the data . 20
6.4 Choices related to the assessment methodologies . 23
Annex A (normative) Template for reporting the choices . 28
Annex B (informative) Examples of assessment boundaries . 30
Annex C (informative) Additional explanation and reporting . 32
Bibliography . 45

European foreword
This document (EN 17423:2020) has been prepared by Technical Committee CEN/TC 371 “Energy
Performance of Buildings project group”, the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2021, and conflicting national standards shall be
withdrawn at the latest by May 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
This document belongs to a series of standards aiming at international harmonization of the methodology
for the assessment of the energy performance of buildings.
For the correct use of this document, a normative template is given in Annex A to report the choices.
The target group of this document are all the users of the set of standards related to the assessment of
the energy performance of buildings and especially national standardization experts or building
authorities who are in charge of defining the PEFs and CO emission coefficients.
In view of the complexity of the issue, the need for contextual knowledge and practicality of use, it is
useful to mention necessary comments and explanations directly in the standard, and not to prepare a
separate CEN/TR (Technical Report). For the same reasons, parts taken from other standards are
appropriate to have in this document.
The document can be applied for different time intervals (annual, monthly, hourly).
This document is a new standard.
1 Scope
This document provides a transparent framework for reporting on the choices related to the procedure
to determine primary energy factors (PEFs) and CO 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 CO emission coefficients
related to different energy carriers. PEFs and CO 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 CO emission coefficients to complete the EPB calculation. But it can also
be used for other applications.
NOTE The CO emission coefficients allow calculating greenhouse gas emissions. According to the choices
made, the CO emission coefficients represent only CO emissions or also other greenhouse gases.
2 2
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.
Table 1 — Position of this document (M1–7), within the modular structure as set out in EN ISO 52000-1
Building
Overarching Technical Building Systems
(as such)
Domestic Building
PV,
Submodule Descriptions Descriptions Descriptions Heating Cooling Ventilation Humidification Dehumidification Hot Lighting automation
wind,.
water and control
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11

1 General General General
Common
terms and
Building
definitions;
2 Energy Needs
symbols,
Needs
units and
subscripts
(Free) Indoor
Maximum
Conditions
3 Applications Load and
without
Power
Systems
Ways to Ways to Ways to
Express Express Express
Energy Energy Energy
Performance Performance Performance
Building
Heat
categories Emission and
5 Transfer by
and Building control
Transmission
Boundaries
Building Heat
Occupancy Transfer by
Distribution
6 and Infiltration
and control
Operating and
Conditions Ventilation
Building
Overarching Technical Building Systems
(as such)
Domestic Building
PV,
Submodule Descriptions Descriptions Descriptions Heating Cooling Ventilation Humidification Dehumidification Hot Lighting automation
wind,.
water and control
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Aggregation
of Energy
Internal Heat Storage and
7 Services and X
Gains control
Energy
Carriers
Building Solar Heat Generation

zoning Gains and control
Load
Building
Calculated dispatching
Dynamics
9 Energy and
(thermal
Performance operating
mass)
conditions
Measured Measured Measured
10 Energy Energy Energy
Performance Performance Performance

11 Inspection Inspection Inspection
Ways to
Express
12 BMS
Indoor
Comfort
External
13 Environment
Conditions
Economic
Calculation
The shaded modules are not applicable.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 15316-4-5, Energy performance of buildings - Method for calculation of system energy requirements and
system efficiencies - Part 4-5: District heating and cooling, Module M3-8-5, M4-8-5, M8-8-5, M11-8-5
EN ISO 7345, Thermal performance of buildings and building components - Physical quantities and
definitions (ISO 7345)
EN ISO 52000-1:2017, Energy performance of buildings - Overarching EPB assessment - Part 1: General
framework and procedures (ISO 52000-1:2017)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 7345, EN ISO 52000-1 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
primary energy
energy that has not been subjected to any conversion or transformation process
Note 1 to entry: Primary energy may be related to non-renewable energy and renewable energy. If both are taken
into account, it is called “total primary energy”.
[SOURCE: EN ISO 52000-1:2017, 3.4.29, modified note – “includes” is replaced by “may be related to”]
3.2
energy carrier
substance or phenomenon that can be used to produce mechanical work, electricity or thermal energy or
to operate chemical or physical processes
[SOURCE: EN ISO 52000-1:2017, 3.4.9, modified – “or heat” has been replaced by “electricity or thermal
energy”.]
3.3
primary energy factor
ratio of the primary energy to the energy delivered to or exported from the assessment boundary
Note 1 to entry: primary energy factor can refer to the total primary energy or to the renewable, or non-renewable
primary energy. To be more precise it should be specified (e.g. non-renewable primary energy factor).
3.3.1
non-renewable primary energy factor for delivered energy carrier
non-renewable primary energy for a given energy carrier, including the delivered energy and the
considered non-renewable energy overheads of delivery to the poin
...