EN ISO 6946:2017
(Main)Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods (ISO 6946:2017, Corrected version 2021-12)
Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods (ISO 6946:2017, Corrected version 2021-12)
ISO 6946:2017 provides the method of calculation of the thermal resistance and thermal transmittance of building components and building elements, excluding doors, windows and other glazed units, curtain walling, components which involve heat transfer to the ground, and components through which air is designed to permeate.
The calculation method is based on the appropriate design thermal conductivities or design thermal resistances of the materials and products for the application concerned.
The method applies to components and elements consisting of thermally homogeneous layers (which can include air layers).
ISO 6946:2017 also provides an approximate method that can be used for elements containing inhomogeneous layers, including the effect of metal fasteners, by means of a correction term given in Annex F. Other cases where insulation is bridged by metal are outside the scope of ISO 6946:2017.
NOTE Table 1 in the Introduction shows the relative position of ISO 6946:2017 within the set of EPB standards in the context of the modular structure as set out in ISO 52000‑1.
Bauteile - Wärmedurchlasswiderstand und Wärmedurchgangskoeffizient - Berechnungsverfahren (ISO 6946:2017, korrigierte Fassung 2021-12)
Dieses Dokument legt das Verfahren zur Berechnung des Wärmedurchlasswiderstandes und des Wärmedurchgangskoeffizienten von Bauteilkomponenten und Bauteilen fest, wobei Türen, Fenster und andere verglaste Einheiten, Vorhangfassaden, an das Erdreich grenzende Bauteilkomponenten und Lüftungselemente ausgenommen sind.
Das Berechnungsverfahren beruht auf den entsprechenden Bemessungswerten der Wärmeleitfähigkeit oder des Wärmedurchlasswiderstands der Baustoffe und Produkte für die jeweilige Anwendung.
Das Verfahren gilt für Bauteilkomponenten und Bauteile aus thermisch homogenen Schichten (die auch Luftschichten enthalten können).
Dieses Dokument gibt auch ein Näherungsverfahren für Bauteile mit inhomogenen Schichten an, wobei die Wirkung von Befestigungselementen aus Metall durch den in Anhang F angegebenen Korrektur¬faktor berücksichtigt wird. Andere Fälle, in denen die Wärmedämmung durch Metall überbrückt wird, sind nicht Gegenstand dieses Dokuments.
Tabelle 1 zeigt die relative Einordnung dieses Dokuments in das EPB-Normenpaket im Kontext der in ISO 52000-1 enthaltenen modularen Struktur.
ANMERKUNG 1 ISO 52000-2 enthält die gleiche Tabelle, in der für jedes Modul die Nummern der relevanten EPB-Normen sowie der zugehörigen Technischen Berichte, die bereits veröffentlicht wurden oder in Erarbeitung sind, angegeben sind.
ANMERKUNG 2 Die Module stellen die EPB-Normen dar, auch wenn eine EPB-Norm mehrere Module abdecken kann und ein Modul von mehreren EPB-Normen abgedeckt werden kann, beispielsweise für den Fall, dass es sowohl ein vereinfachtes als auch ein detailliertes Verfahren gibt. Siehe auch Abschnitt 2 und die Tabellen A.1 und B.1.
Tabelle 1 — Einordnung dieses Dokuments (hier: M2-5) innerhalb der modular aufgebauten Struktur des EPB Normenpakets
....
Composants et parois de bâtiments - Résistance thermique et coefficient de transmission thermique - Méthodes de calcul (ISO 6946:2017, Version corrigée 2021-12)
L'ISO 6946:2017 fournit la méthode de calcul de la résistance thermique et du coefficient de transmission thermique des composants et parois de bâtiments, à l'exclusion des portes, des fenêtres et autres parois vitrées, des murs-rideaux, des composants qui impliquent un transfert de chaleur vers le sol et des composants parcourus par l'air de ventilation du bâtiment.
La méthode de calcul est basée sur les conductivités thermiques utiles ou résistances thermiques utiles appropriées des matériaux et produits pour l'application concernée.
La méthode s'applique aux composants et parois constitués de couches thermiquement homogènes (qui peuvent comprendre des lames d'air).
L'ISO 6946:2017 fournit aussi une méthode approchée, qui peut être appliquée pour les parois comportant des couches hétérogènes et qui tient compte de l'effet des fixations métalliques, par l'utilisation d'un terme de correction fourni dans l'Annexe F. Les autres cas, où l'isolation est traversée par du métal, ne relèvent pas du domaine d'application de l'ISO 6946:2017.
NOTE Le Tableau 1 de l'Introduction indique la position relative de l'ISO 6946:2017 dans la série de normes PEB dans le contexte de la structure modulaire définie dans l'ISO 52000‑1.
Gradbene komponente in gradbeni elementi - Toplotna upornost in toplotna prehodnost - Računske metode (ISO 6946:2017, popravljena različica 2021-12)
Ta dokument podaja metodo za izračun toplotne upornosti in toplotne prehodnosti gradbenih komponent ter gradbenih elementov, ki ne zajemajo vrat, oken in drugih zastekljenih enot, obešenih fasad, komponent, ki vključujejo prenos toplote v tla, ter komponent, zasnovanih za pretok zraka.
Računska metoda temelji na ustreznih načrtovanih toplotnih prevodnostih ali upornostih materialov in proizvodov za zadevne načine uporabe.
Metoda se uporablja za komponente in elemente, sestavljene iz toplotno homogenih plasti (ki lahko vključujejo zračne plasti).
Ta dokument podaja tudi približno metodo, ki se lahko uporablja za elemente z
nehomogenimi plastmi, vključno z učinkom kovinskih pritrdil, na podlagi korekcije iz dodatka F. Drugi primeri, pri katerih je izolacija premostena s kovino, so zunaj področja uporabe tega dokumenta.
OPOMBA: Preglednica 1 v uvodu prikazuje relativno mesto tega dokumenta znotraj skupine standardov EPB v kontekstu modularne strukture, kot je opredeljeno v standardu ISO 52000-1.
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Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2017
1DGRPHãþD
SIST EN ISO 6946:2008
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Building components and building elements - Thermal resistance and thermal
transmittance - Calculation methods (ISO 6946:2017)
Bauteile - Wärmedurchlasswiderstand und Wärmedurchgangskoeffizient -
Berechnungsverfahren (ISO 6946:2017)
Composants et parois de bâtiments - Résistance thermique et coefficient de
transmission thermique - Méthode de calcul (ISO 6946:2017)
Ta slovenski standard je istoveten z: EN ISO 6946:2017
ICS:
91.060.01 Stavbni elementi na splošno Elements of buildings 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 ISO 6946
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2017
EUROPÄISCHE NORM
ICS 91.120.10 Supersedes EN ISO 6946:2007
English Version
Building components and building elements - Thermal
resistance and thermal transmittance - Calculation
methods (ISO 6946:2017)
Composants et parois de bâtiments - Résistance Bauteile - Wärmedurchlasswiderstand und
thermique et coefficient de transmission thermique - Wärmedurchgangskoeffizient - Berechnungsverfahren
Méthodes de calcul (ISO 6946:2017) (ISO 6946:2017)
This European Standard was approved by CEN on 27 February 2017.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6946:2017 E
worldwide for CEN national Members.
Contents Page
European Foreword . 3
European Foreword
This document (EN ISO 6946:2017) has been prepared by Technical Committee ISO/TC 163 "Thermal
performance and energy use in the built environment" in collaboration with Technical Committee
CEN/TC 89 “Thermal performance of buildings and building components” the secretariat of which is
held by SIS.
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 January 2018 and conflicting national standards shall
be withdrawn at the latest by January 2018.
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.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This document is part of the set of standards and accompanying technical reports on the energy
performance of buildings and has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association (Mandate M/480, see reference [EF3] below).
Directive 2010/31/EU recasting the Directive 2002/91/EC on energy performance of buildings (EPBD,
[EF4]) promotes the improvement of the energy performance of buildings within the European Union,
taking into account all types of energy uses (heating, lighting, cooling, air conditioning, ventilation) and
outdoor climatic and local conditions, as well as indoor climate requirements and cost effectiveness
(Article 1).
The directive requires Member States to adopt measures and tools to achieve the prudent and rational
use of energy resources. In order to achieve those goals, the EPBD requires increasing energy efficiency
and the enhanced use of renewable energies in both new and existing buildings. One tool for this is the
application by Member States of minimum requirements on the energy performance of new buildings
and for existing buildings that are subject to major renovation, as well as for minimum performance
requirements for the building envelope if energy-relevant parts are replaced or retrofitted. Other tools
are energy certification of buildings, inspection of boilers and air-conditioning systems.
The use of European standards increases the accessibility, transparency and objectivity of the energy
performance assessment in the Member States facilitating the comparison of best practices and
supporting the internal market for construction products. The use of EPB standards for calculating
energy performance, as well as for energy performance certification and the inspection of heating
systems and boilers, ventilation and air-conditioning systems will reduce costs compared to developing
different standards at national level.
The first mandate to CEN to develop a set of CEN EPBD standards (M/343, [EF1]), to support the first
edition of the EPBD ([EF2]) resulted in the successful publication of all EPBD related CEN standards in
2007-2008.
Mandate M/480 was issued to review the mandate M/343 as the recast of the EPBD raised the need to
revisit the standards and reformulate and add standards so that they become on the one hand
unambiguous and compatible, and on the other hand a clear and explicit overview of the choices,
boundary conditions and input data that need to be defined at national or regional level. Such national
or regional choices remain necessary, due to differences in climate, culture and building tradition,
policy and legal frameworks. Consequently, the set of CEN EPBD standards published in 2007-2008 had
to be improved and expanded on the basis of the recast of the EPBD.
The EPB standards are flexible enough to allow for necessary national and regional differentiation and
facilitate Member States implementation and the setting of requirements by the Member States.
Further target groups are users of the voluntary common European Union certification scheme for the
energy performance of non-residential buildings (EPBD article 11.9) and any other regional (e.g. pan
European) parties wanting to motivate their assumptions by classifying the building energy
performance for a dedicated building stock.
This document supersedes EN ISO 6946:2007.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
References:
[EF1] EPBD, Directive 2002/91/EC of the European Parliament and of the Council of 16 December
2002 on the energy performance of buildings
[EF2] EPBD Mandate M/343, Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of
standards for a methodology calculating the integrated energy performance of buildings and
estimating the environmental impact, in accordance with the terms set forth in Directive
2002/91/EC , 30 January 2004
[EF3] Mandate M/480, Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of
standards for a methodology calculating the integrated energy performance of buildings and
promoting the energy efficiency of buildings, in accordance with the terms set in the recast of
the Directive on the energy performance of buildings (2010/31/EU), 14 December 2010
[EF4] EPBD, Recast of the Directive on the energy performance of buildings (2010/31/EU). 14
December 2010
Endorsement notice
The text of ISO 6946:2017 has been approved by CEN as EN ISO 6946:2017 without any modification.
INTERNATIONAL ISO
STANDARD 6946
Third edition
2017-06
Building components and building
elements — Thermal resistance and
thermal transmittance — Calculation
methods
Composants et parois de bâtiments — Résistance thermique et
coefficient de transmission thermique — Méthodes de calcul
Reference number
ISO 6946:2017(E)
©
ISO 2017
ISO 6946:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
ISO 6946:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and subscripts . 3
4.1 Symbols . 3
4.2 Subscripts . 3
5 Description of the method . 3
5.1 Output . 3
5.2 General description . 4
5.3 Detailed calculation method . 4
5.4 Simplified calculation method . 4
6 Calculation of thermal transmittance and thermal resistance . 4
6.1 Output data . 4
6.2 Calculation time intervals . 4
6.3 Input data . 4
6.4 Principles of the simplified calculation procedure . 5
6.5 Thermal transmittance . 6
6.5.1 By detailed calculation method . 6
6.5.2 By simplified calculation method . 6
6.6 Th
...
SLOVENSKI STANDARD
01-september-2017
Nadomešča:
SIST EN ISO 6946:2008
Gradbene komponente in gradbeni elementi - Toplotna upornost in toplotna
prehodnost - Računske metode (ISO 6946:2017, popravljena različica 2021-12)
Building components and building elements - Thermal resistance and thermal
transmittance - Calculation methods (ISO 6946:2017, Corrected version 2021-12)
Bauteile - Wärmedurchlasswiderstand und Wärmedurchgangskoeffizient -
Berechnungsverfahren (ISO 6946:2017, korrigierte Fassung 2021-12)
Composants et parois de bâtiments - Résistance thermique et coefficient de
transmission thermique - Méthodes de calcul (ISO 6946:2017, Version corrigée 2021-12)
Ta slovenski standard je istoveten z: EN ISO 6946:2017
ICS:
91.060.01 Stavbni elementi na splošno Elements of buildings 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 ISO 6946
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2017
EUROPÄISCHE NORM
ICS 91.120.10 Supersedes EN ISO 6946:2007
English Version
Building components and building elements - Thermal
resistance and thermal transmittance - Calculation
methods (ISO 6946:2017, Corrected version 2021-12)
Composants et parois de bâtiments - Résistance Bauteile - Wärmedurchlasswiderstand und
thermique et coefficient de transmission thermique - Wärmedurchgangskoeffizient - Berechnungsverfahren
Méthodes de calcul (ISO 6946:2017, Version corrigée (ISO 6946:2017, korrigierte Fassung 2021-12)
2021-12)
This European Standard was approved by CEN on 27 February 2017.
This European Standard was corrected and reissued by the CEN-CENELEC Management Centre on 22 December 2021.
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 NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6946:2017 E
worldwide for CEN national Members.
Contents Page
European Foreword . 3
European Foreword
This document (EN ISO 6946:2017) has been prepared by Technical Committee ISO/TC 163 "Thermal
performance and energy use in the built environment" in collaboration with Technical Committee
CEN/TC 89 “Thermal performance of buildings and building components” the secretariat of which is
held by SIS.
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 January 2018 and conflicting national standards shall
be withdrawn at the latest by January 2018.
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.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This document is part of the set of standards and accompanying technical reports on the energy
performance of buildings and has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association (Mandate M/480, see reference [EF3] below).
Directive 2010/31/EU recasting the Directive 2002/91/EC on energy performance of buildings (EPBD,
[EF4]) promotes the improvement of the energy performance of buildings within the European Union,
taking into account all types of energy uses (heating, lighting, cooling, air conditioning, ventilation) and
outdoor climatic and local conditions, as well as indoor climate requirements and cost effectiveness
(Article 1).
The directive requires Member States to adopt measures and tools to achieve the prudent and rational
use of energy resources. In order to achieve those goals, the EPBD requires increasing energy efficiency
and the enhanced use of renewable energies in both new and existing buildings. One tool for this is the
application by Member States of minimum requirements on the energy performance of new buildings
and for existing buildings that are subject to major renovation, as well as for minimum performance
requirements for the building envelope if energy-relevant parts are replaced or retrofitted. Other tools
are energy certification of buildings, inspection of boilers and air-conditioning systems.
The use of European standards increases the accessibility, transparency and objectivity of the energy
performance assessment in the Member States facilitating the comparison of best practices and
supporting the internal market for construction products. The use of EPB standards for calculating
energy performance, as well as for energy performance certification and the inspection of heating
systems and boilers, ventilation and air-conditioning systems will reduce costs compared to developing
different standards at national level.
The first mandate to CEN to develop a set of CEN EPBD standards (M/343, [EF1]), to support the first
edition of the EPBD ([EF2]) resulted in the successful publication of all EPBD related CEN standards in
2007-2008.
Mandate M/480 was issued to review the mandate M/343 as the recast of the EPBD raised the need to
revisit the standards and reformulate and add standards so that they become on the one hand
unambiguous and compatible, and on the other hand a clear and explicit overview of the choices,
boundary conditions and input data that need to be defined at national or regional level. Such national
or regional choices remain necessary, due to differences in climate, culture and building tradition,
policy and legal frameworks. Consequently, the set of CEN EPBD standards published in 2007-2008 had
to be improved and expanded on the basis of the recast of the EPBD.
The EPB standards are flexible enough to allow for necessary national and regional differentiation and
facilitate Member States implementation and the setting of requirements by the Member States.
Further target groups are users of the voluntary common European Union certification scheme for the
energy performance of non-residential buildings (EPBD article 11.9) and any other regional (e.g. pan
European) parties wanting to motivate their assumptions by classifying the building energy
performance for a dedicated building stock.
This document supersedes EN ISO 6946:2007.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
References:
[EF1] EPBD, Directive 2002/91/EC of the European Parliament and of the Council of 16 December
2002 on the energy performance of buildings
[EF2] EPBD Mandate M/343, Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of
standards for a methodology calculating the integrated energy performance of buildings and
estimating the environmental impact, in accordance with the terms set forth in Directive
2002/91/EC , 30 January 2004
[EF3] Mandate M/480, Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of
standards for a methodology calculating the integrated energy performance of buildings and
promoting the energy efficiency of buildings, in accordance with the terms set in the recast of
the Directive on the energy performance of buildings (2010/31/EU), 14 December 2010
[EF4] EPBD, Recast of the Directive on the energy performance of buildings (2010/31/EU). 14
December 2010
Endorsement notice
The text of ISO 6946:2017, Corrected version 2021-12 has been approved by CEN as EN ISO 6946:2017
without any modification.
INTERNATIONAL ISO
STANDARD 6946
Third edition
2017-06
Corrected version
2021-12
Building components and building
elements — Thermal resistance and
thermal transmittance — Calculation
methods
Composants et parois de bâtiments — Résistance thermique et
coefficient de transmission thermique — Méthodes de calcul
Reference number
ISO 6946:2017(E)
ISO 6946:2017(E)
© ISO 2017
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 6946:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and subscripts . 3
4.1 Symbols . 3
4.2 Subscripts . . 3
5 Description of the method . 3
5.1 Output . 3
5.2 General description . 4
5.3 Detailed calculation method . 4
5.4 Simplified calculation method . 4
6 Calculation of thermal transmittance and thermal resistance .4
6.1 Output data . 4
6.2 Calculation time intervals . 4
6.3 Input data . 4
6.4 Principles of the simplified calculation procedure . 5
6.5 Thermal transmittance .
...
SLOVENSKI SIST EN ISO 6946
STANDARD september 2017
Gradbene komponente in gradbeni elementi – Toplotna upornost in
toplotna prehodnost – Računske metode (ISO 6946:2017)
Building components and building elements – Thermal resistance and thermal
transmittance – Calculation methods (ISO 6946:2017)
Composants et parois de bâtiments – Résistance thermique et coefficient de
transmission thermique – Méthode de calcul (ISO 6946:2017)
Bauteile – Wärmedurchlasswiderstand und Wärmedurchgangskoeffizient –
Berechnungsverfahren (ISO 6946:2017)
Referenčna oznaka
ICS 91.060.01; 91.120.10 SIST EN ISO 6946:2017 (sl)
Nadaljevanje na straneh II in od 1 do 48
© 2020-06. Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno.
SIST EN ISO 6946 : 2017
NACIONALNI UVOD
Standard SIST EN ISO 6946 (sl), Gradbene komponente in gradbeni elementi – Toplotna upornost in
toplotna prehodnost – Računske metode (ISO 6946:2017), 2017, ima status slovenskega standarda in
je enakovreden evropskemu standardu EN ISO 6946 (en), Building components and building elements
– Thermal resistance and thermal transmittance – Calculation methods (ISO 6946:2017), 2017-07.
NACIONALNI PREDGOVOR
Evropski standard EN ISO 6946:2017 je pripravil tehnični odbor ISO/TC 163 Toplotne lastnosti in raba
energije v grajenem okolju v sodelovanju s tehničnim odborom CEN/TC 89 Toplotne lastnosti stavb in
gradbenih komponent. Slovenski standard SIST EN ISO 6946:2017 je prevod angleškega besedila
evropskega standarda EN ISO 6946:2017. V primeru spora glede besedila slovenskega prevoda v tem
standardu je odločilen izvirni standard v angleškem jeziku. Slovenski standard je pripravil SIST/TC TOP
Toplota.
Odločitev za privzem tega standarda je dne 7. avgusta 2017 sprejel SIST/TC TOP Toplota.
ZVEZA S STANDARDI
S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
SIST EN ISO 7345 Toplotne značilnosti stavb in delov stavb – Fizikalne količine in definicije
(ISO 7345)
SIST EN ISO 10211 Toplotni mostovi v stavbah – Toplotni tokovi in površinske temperature –
Podrobni izračuni (ISO 10211)
SIST EN ISO 10456 Gradbeni materiali in proizvodi – Higrotermalne lastnosti – Tabelirane računske
vrednosti in postopki za določevanje nazivnih in računskih vrednosti toplotnih
vrednosti (ISO 10456)
SIST EN ISO 13789 Toplotne značilnosti stavb – Toplotni koeficienti pri prenosu toplote in
prezračevanju – Računska metoda (ISO 13789)
SIST EN ISO 52000-1 Energijske lastnosti stavb – Krovni standard za ocenjevanje energijskih
lastnosti stavb – 1. del: Splošni okvir in postopki (ISO 52000-1)
OSNOVA ZA IZDAJO STANDARDA
– privzem standarda EN ISO 6946:2017
OPOMBE
– Povsod, kjer se v besedilu standarda uporablja izraz ''evropski standard'' ali "mednarodni standard",
v SIST EN ISO 6946:2017 to pomeni ''slovenski standard''.
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.
– Ta nacionalni dokument je enakovreden EN ISO 6946:2017 in je objavljen z dovoljenjem
CEN-CENELEC
Upravni center
Avenue Marnix 17
B-1000 Bruselj
This national document is identical with EN ISO 6946:2017 and is published with the permission of
CEN-CENELEC
Management Centre
Avenue Marnix 17
B-1000 Brussels
II
EVROPSKI STANDARD EN ISO 6946
EUROPEAN STANDARD
NORME EUROPÉENNE
julij 2017
EUROPÄISCHE NORM
ICS 91.120.10 Nadomešča EN ISO 6946:2007
Slovenska izdaja
Gradbene komponente in gradbeni elementi – Toplotna upornost in
toplotna prehodnost – Računske metode (ISO 6946:2017)
Building components and Composants et parois de Bauteile –
building elements – Thermal bâtiments – Résistance Wärmedurchlasswiderstand und
resistance and thermal thermique et coefficient de Wärmedurchgangskoeffizient –
transmittance – Calculation transmission thermique – Berechnungsverfahren
methods (ISO 6946:2017) Méthode de calcul (ISO 6946:2017)
(ISO 6946:2017)
Ta evropski standard je CEN sprejel 27. februarja 2017.
Člani CEN morajo izpolnjevati notranje predpise CEN/CENELEC, s katerimi so predpisani pogoji za
privzem tega evropskega standarda na nacionalno raven brez kakršnihkoli sprememb. Najnovejši
seznami teh nacionalnih standardov z njihovimi bibliografskimi podatki se na zahtevo lahko dobijo pri
Upravnem centru CEN-CENELEC ali kateremkoli članu CEN.
Ta evropski standard obstaja v treh uradnih izdajah (angleški, francoski in nemški). Izdaje v drugih
jezikih, ki jih člani CEN na lastno odgovornost prevedejo in izdajo ter prijavijo pri Upravnem centru CEN-
CENELEC, veljajo kot uradne izdaje.
Člani CEN so nacionalni organi za standarde Avstrije, Belgije, Bolgarije, Cipra, Češke republike, Danske,
Estonije, Finske, Francije, Grčije, Hrvaške, Irske, Islandije, Italije, Latvije, Litve, Luksemburga,
Madžarske, Malte, Nekdanje jugoslovanske republike Makedonije, Nemčije, Nizozemske, Norveške,
Poljske, Portugalske, Romunije, Slovaške, Slovenije, Srbije, Španije, Švedske, Švice, Turčije in
Združenega kraljestva.
CEN
Evropski komite za standardizacijo
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Upravni center CEN-CENELEC: Avenue Marnix 17, B-1000 Bruselj
© 2017 CEN Lastnice avtorskih pravic so vse države članice CEN Ref. oznaka EN ISO 6946:2017 E
SIST EN ISO 6946 : 2017
VSEBINA Stran
Evropski predgovor . 4
Predgovor k mednarodnemu standardu . 6
Uvod . 7
1 Področje uporabe . 11
2 Zveze s standardi . 11
3 Izrazi in definicije . 12
4 Simboli in indeksi . 13
4.1 Simboli . 13
4.2 Indeksi . 13
5 Opis metode . 14
5.1 Izhodni podatki . 14
5.2 Splošni opis . 14
5.3 Podrobna računska metoda . 14
5.4 Poenostavljena računska metoda . 14
6 Računanje toplotne prehodnosti in toplotne upornosti . 14
6.1 Izhodni podatki . 14
6.2 Časovni intervali računanja . 14
6.3 Vhodni podatki . 15
6.4 Načela poenostavljenega računskega postopka . 16
6.5 Toplotna prehodnost . 16
6.5.1 Pri podrobni računski metodi . 16
6.5.2 Pri poenostavljeni računski metodi . 16
6.6 Toplotna upornost . 17
6.7 Celotna toplotna upornost . 17
6.7.1 Toplotna upornost homogenih komponent . 17
6.7.2 Celotna toplotna upornost gradbene komponente, sestavljene iz homogenih
in nehomogenih slojev . 18
6.8 Površinske upornosti . 22
6.9 Toplotna upornost zračnih slojev . 22
6.9.1 Uporabnost . 22
6.9.2 Neprezračevan zračni sloj . 23
6.9.3 Rahlo prezračevan zračni sloj . 23
6.9.4 Dobro prezračevan zračni sloj . 24
6.10 Toplotna upornost neogrevanih prostorov . 24
610.1 Splošno . 24
6.10.2 Strešne površine . 24
6.10.3 Drugi prostori . 25
Dodatek A (normativni): Preglednica nabora vhodnih podatkov in metod – predloga . 26
Dodatek B (informativni): Preglednica nabora vhodnih podatkov in metod – privzete izbire . 29
SIST EN ISO 6946 : 2017
Dodatek C (normativni): Površinske upornosti . 32
Dodatek D (normativni): Toplotna upornost zračnih prostorov . 35
Dodatek E (normativni): Računanje toplotne prehodnosti komponent s konusnimi sloji . 38
Dodatek F (normativni): Popravek toplotne prehodnosti . 43
Literatura . 48
SIST EN ISO 6946 : 2017
Evropski predgovor
Ta dokument (EN ISO 6946:2017) je pripravil tehnični odbor ISO/TC 163 "Toplotne lastnosti in raba
energije v grajenem okolju" v sodelovanju s tehničnim odborom CEN/TC 89 "Toplotne lastnosti stavb in
gradbenih komponent", katerega sekretariat vodi SIS.
Ta evropski standard mora dobiti status nacionalnega standarda bodisi z objavo istovetnega besedila
ali z razglasitvijo najpozneje januarja 2018, nasprotujoče nacionalne standarde pa je treba razveljaviti
najpozneje januarja 2018.
Opozoriti je treba na možnost, da bi lahko bil kateri od elementov tega dokumenta predmet patentnih
pravic. CEN ni odgovoren za identificiranje nobene od teh patentnih pravic.
Ta dokument je bil pripravljen v okviru mandata, ki sta ga Evropska komisija in Evropsko združenje za
prosto trgovino (EFTA) dala CEN.
Ta dokument je del niza standardov in spremljajočih tehničnih poročil o energijskih lastnostih stavb, ki
jih je CEN pripravil na podlagi mandata Evropske komisije in Evropskega združenja za prosto trgovino
(mandat M/480, glej referenco [EF3] spodaj).
Direktiva 2010/31/EU, ki prenavlja Direktivo 2002/91/ES o energetski učinkovitosti stavb (EPBD, [EF4]),
spodbuja izboljšave energijskih lastnosti stavb v Evropski uniji ob upoštevanju vseh vrst rabe energije
(ogrevanje, razsvetljava, hlajenje, klimatizacija, prezračevanje) ter zunanjih podnebnih in krajevnih
pogojev, prav tako pa tudi notranjih klimatskih pogojev in stroškovne učinkovitosti (1. člen).
Direktiva zahteva od držav članic, da sprejmejo ukrepe in orodja za doseganje preudarne in racionalne
rabe energijskih virov. Za doseganje teh ciljev direktiva EPBD zahteva povečanje energetske
učinkovitosti in izboljšanje rabe obnovljivih virov energije tako v novih kot obstoječih stavbah. Eno od
orodij, ki ga države članice uporabljajo v ta namen, so minimalne zahteve za energijske lastnosti novih
stavb in obstoječih stavb pri večji prenovi ter tudi minimalne zahteve za lastnosti ovoja stavbe pri
zamenjavi ali naknadni vgradnji delov, pomembnih z vidika energije. Druga orodja so energetske
izkaznice stavb ter nadzor kotlov in klimatskih sistemov.
Uporaba evropskih standardov povečuje dostopnost, preglednost in objektivnost ocene energetske
učinkovitosti v državah članicah za lažjo primerjavo najboljših praks in podporo notranjega trga za
gradbene proizvode. Uporaba standardov o energijskih lastnostih stavb (standardi EPB) za računanje
energijskih lastnosti ter tudi za potrjevanje energijskih lastnost
...
S L O V E N S K I SIST EN ISO 6946
S T A N D A R D september 2017
popravljena različica december 2021
Gradbene komponente in gradbeni elementi – Toplotna upornost in
toplotna prehodnost – Računske metode (ISO 6946:2017, popravljena
različica 2021-12)
Building components and building elements – Thermal resistance and thermal
transmittance – Calculation methods (ISO 6946:2017, Corrected version
2021-12)
Composants et parois de bâtiments – Résistance thermique et coefficient de
transmission thermique – Méthode de calcul (ISO 6946:2017, Version corrigée
2021-12)
Bauteile – Wärmedurchlasswiderstand und Wärmedurchgangskoeffizient –
Berechnungsverfahren (ISO 6946:2017, korrigierte Fassung 2021-12)
Referenčna oznaka
ICS 91.060.01; 91.120.10 SIST EN ISO 6946:2017 (sl)
Nadaljevanje na straneh II in III ter od 1 do 48
© 2020-06. Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno.
SIST EN ISO 6946 : 2017
NACIONALNI UVOD
Standard SIST EN ISO 6946 (sl), Gradbene komponente in gradbeni elementi – Toplotna upornost in
toplotna prehodnost – Računske metode (ISO 6946:2017, popravljena različica 2021-12), 2017, ima
status slovenskega standarda in je enakovreden evropskemu standardu EN ISO 6946 (en), Building
components and building elements – Thermal resistance and thermal transmittance – Calculation
methods (ISO 6946:2017, corrected version 2021-12), 2017-07.
NACIONALNI PREDGOVOR
Evropski standard EN ISO 6946:2017 je pripravil tehnični odbor ISO/TC 163 Toplotne lastnosti in raba
energije v grajenem okolju v sodelovanju s tehničnim odborom CEN/TC 89 Toplotne lastnosti stavb in
gradbenih komponent. Slovenski standard SIST EN ISO 6946:2017 je prevod angleškega besedila
evropskega standarda EN ISO 6946:2017. V primeru spora glede besedila slovenskega prevoda v tem
standardu je odločilen izvirni standard v angleškem jeziku. Slovenski standard je pripravil SIST/TC TOP
Toplota.
Ta popravljena različica SIST EN ISO 6946:2017 vključuje naslednja popravka:
2 2
– enačba (11): v definiciji A je bil m spremenjen v mm ;
ve
– enačba (F.5): d je bil zamenjan z d .
1 0
Odločitev za privzem tega standarda je dne 7. avgusta 2017 sprejel SIST/TC TOP Toplota.
ZVEZA S STANDARDI
S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
SIST EN ISO 7345 Toplotne značilnosti stavb in delov stavb – Fizikalne količine in definicije
(ISO 7345)
SIST EN ISO 10211 Toplotni mostovi v stavbah – Toplotni tokovi in površinske temperature –
Podrobni izračuni (ISO 10211)
SIST EN ISO 10456 Gradbeni materiali in proizvodi – Higrotermalne lastnosti – Tabelirane računske
vrednosti in postopki za določevanje nazivnih in računskih vrednosti toplotnih
vrednosti (ISO 10456)
SIST EN ISO 13789 Toplotne značilnosti stavb – Toplotni koeficienti pri prenosu toplote in
prezračevanju – Računska metoda (ISO 13789)
SIST EN ISO 52000-1 Energijske lastnosti stavb – Krovni standard za ocenjevanje energijskih
lastnosti stavb – 1. del: Splošni okvir in postopki (ISO 52000-1)
OSNOVA ZA IZDAJO STANDARDA
– privzem standarda EN ISO 6946:2017, Corrected version 2021-12
OPOMBE
– Povsod, kjer se v besedilu standarda uporablja izraz ''evropski standard'' ali "mednarodni standard",
v SIST EN ISO 6946:2017 to pomeni ''slovenski standard''.
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.
II
SIST EN 13108-7 : 2017
– Ta nacionalni dokument je enakovreden EN ISO 6946:2017 in je objavljen z dovoljenjem
CEN-CENELEC
Upravni center
Avenue Marnix 17
B-1000 Bruselj
This national document is identical with EN ISO 6946:2017 and is published with the permission of
CEN-CENELEC
Management Centre
Avenue Marnix 17
B-1000 Brussels
III
EVROPSKI STANDARD EN ISO 6946
EUROPEAN STANDARD
NORME EUROPÉENNE
julij 2017
EUROPÄISCHE NORM
ICS 91.120.10 Nadomešča EN ISO 6946:2007
Slovenska izdaja
Gradbene komponente in gradbeni elementi – Toplotna upornost in
toplotna prehodnost – Računske metode (ISO 6946:2017, popravljena
različica 2021-12)
Building components and Composants et parois de Bauteile –
building elements – Thermal bâtiments – Résistance Wärmedurchlasswiderstand und
resistance and thermal thermique et coefficient de Wärmedurchgangskoeffizient –
transmittance – Calculation transmission thermique – Berechnungsverfahren
methods (ISO 6946:2017, Méthode de calcul (ISO 6946:2017, korrigierte
Corrected version (ISO 6946:2017, Version Fassung 2021-12)
2021-12) corrigée 2021-12)
Ta evropski standard je CEN sprejel 27. februarja 2017.
Ta evropski standard je bil popravljen in ga je Upravni center CEN-CENELEC ponovno izdal
22. decembra 2021.
Člani CEN morajo izpolnjevati notranje predpise CEN/CENELEC, s katerimi so predpisani pogoji za
privzem tega evropskega standarda na nacionalno raven brez kakršnihkoli sprememb. Najnovejši
seznami teh nacionalnih standardov z njihovimi bibliografskimi podatki se na zahtevo lahko dobijo pri
Upravnem centru CEN-CENELEC ali kateremkoli članu CEN.
Ta evropski standard obstaja v treh uradnih izdajah (angleški, francoski in nemški). Izdaje v drugih
jezikih, ki jih člani CEN na lastno odgovornost prevedejo in izdajo ter prijavijo pri Upravnem centru CEN-
CENELEC, veljajo kot uradne izdaje.
Člani CEN so nacionalni organi za standarde Avstrije, Belgije, Bolgarije, Cipra, Češke republike, Danske,
Estonije, Finske, Francije, Grčije, Hrvaške, Irske, Islandije, Italije, Latvije, Litve, Luksemburga,
Madžarske, Malte, Nekdanje jugoslovanske republike Makedonije, Nemčije, Nizozemske, Norveške,
Poljske, Portugalske, Romunije, Slovaške, Slovenije, Srbije, Španije, Švedske, Švice, Turčije in
Združenega kraljestva.
CEN
Evropski komite za standardizacijo
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Upravni center CEN-CENELEC: Rue de la Science, B-1040 Bruselj
© 2017 CEN Lastnice avtorskih pravic so vse države članice CEN Ref. oznaka EN ISO 6946:2017 E
SIST EN ISO 6946 : 2017
VSEBINA Stran
Evropski predgovor . 4
Predgovor k mednarodnemu standardu . 6
Uvod . 7
1 Področje uporabe .11
2 Zveze s standardi .11
3 Izrazi in definicije .12
4 Simboli in indeksi .13
4.1 Simboli .13
4.2 Indeksi .13
5 Opis metode .14
5.1 Izhodni podatki .14
5.2 Splošni opis .14
5.3 Podrobna računska metoda .14
5.4 Poenostavljena računska metoda .14
6 Računanje toplotne prehodnosti in toplotne upornosti .14
6.1 Izhodni podatki .14
6.2 Časovni intervali računanja .14
6.3 Vhodni podatki .15
6.4 Načela poenostavljenega računskega postopka .16
6.5 Toplotna prehodnost .16
6.5.1 Pri podrobni računski metodi .16
6.5.2 Pri poenostavljeni računski metodi .16
6.6 Toplotna upornost .17
6.7 Celotna toplotna upornost .17
6.7.1 Toplotna upornost homogenih komponent .17
6.7.2 Celotna toplotna upornost gradbene komponente, sestavljene iz homogenih
in nehomogenih slojev .18
6.8 Površinske upornosti .22
6.9 Toplotna upornost zračnih slojev .22
6.9.1 Uporabnost .22
6.9.2 Neprezračevan zračni sloj .23
6.9.3 Rahlo prezračevan zračni sloj .23
6.9.4 Dobro prezračevan zračni sloj .24
6.10 Toplotna upornost neogrevanih prostorov .24
6.10.1 Splošno .24
6.10.2 Strešne površine .24
6.10.3 Drugi prostori .25
Dodatek A (normativni): Preglednica nabora vhodnih podatkov in metod – predloga .26
Dodatek B (informativni): Preglednica nabora vhodnih podatkov in metod – privzete izbire .29
SIST EN ISO 6946 : 2017
Dodatek C (normativni): Površinske upornosti .32
Dodatek D (normativni): Toplotna upornost zračnih prostorov .35
Dodatek E (normativni): Računanje toplotne prehodnosti komponent s konusnimi sloji .38
Dodatek F (normativni): Popravek toplotne prehodnosti .43
Literatura .48
SIST EN ISO 6946 : 2017
Evropski predgovor
Ta dokument (EN ISO 6946:2017) je pripravil tehnični odbor ISO/TC 163 "Toplotne lastnosti in raba
energije v grajenem okolju" v sodelovanju s tehničnim odborom CEN/TC 89 "Toplotne lastnosti stavb in
gradbenih komponent", katerega sekretariat vodi SIS.
Ta evropski standard mora dobiti status nacionalnega standarda bodisi z objavo istovetnega besedila
ali z razglasitvijo najpozneje januarja 2018, nasprotujoče nacionalne standarde pa je treba razveljaviti
najpozneje januarja 2018.
Opozoriti je treba na možnost, da bi lahko bil kateri od elementov tega dokumenta predmet patentnih
pravic. CEN ni odgovoren za identificiranje nobene od teh patentnih pravic.
Ta dokument je bil pripravljen v okviru mandata, ki sta ga Evropska komisija in Evropsko združenje za
prosto trgovino (EFTA) dala CEN.
Ta dokument je del niza standardov in spremljajočih tehničnih poročil o energijskih lastnostih stavb, ki
jih je CEN pripravil na podlagi mandata Evropske komisije in Evropskega združenja za prosto trgovino
(mandat M/480, glej referenco [EF3] spodaj).
Direktiva 2010/31/EU, ki prenavlja Direktivo 2002/91/ES o energetski učinkovitosti stavb (EPBD, [EF4]),
spodbuja izboljšave energijskih lastnosti stavb v Evropski uniji ob upoštevanju vseh vrst rabe energije
(ogrevanje, razsvetljava, hlajenje, klimatizacija, prezračevanje) ter zunanjih podnebnih in krajevnih
pogojev, prav tako pa tudi notranjih klimatskih pogojev in stroškovne učinkovitosti (1. člen).
Direktiva zahteva od držav članic, da sprejmejo ukrepe in orodja za doseganje preudarne in racionalne
rabe energijskih virov. Za doseganje teh ciljev direktiva EPBD zahteva povečanje energetske
učinkovitosti in izboljšanje rabe obnovljivih virov energije tako v novih kot obstoječih stavb
...
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