SIST EN ISO 10211:2017
(Main)Thermal bridges in building construction - Heat flows and surface temperatures - Detailed calculations (ISO 10211:2017)
Thermal bridges in building construction - Heat flows and surface temperatures - Detailed calculations (ISO 10211:2017)
This document sets out the specifications for a three-dimensional and a two-dimensional geometrical
model of a thermal bridge for the numerical calculation of
— heat flows, in order to assess the overall heat loss from a building or part of it, and
— minimum surface temperatures, in order to assess the risk of surface condensation.
These specifications include the geometrical boundaries and subdivisions of the model, the thermal
boundary conditions, and the thermal values and relationships to be used.
This document is based upon the following assumptions:
— all physical properties are independent of temperature;
— there are no heat sources within the building element.
This document can also be used for the derivation of linear and point thermal transmittances and of
surface temperature factors.
NOTE Table 1 in the Introduction shows the relative position of this document within the set of EPB standards
in the context of the modular structure as set out in ISO 52000-1.
Wärmebrücken im Hochbau - Wärmeströme und Oberflächentemperaturen - Detaillierte Berechnungen (ISO 10211:2017)
Dieses Dokument legt die Spezifikationen für geometrische dreidimensionale und zweidimensionale Modelle von Wärmebrücken zur numerischen Berechnung
- von Wärmeströmen zur Abschätzung der Gesamtwärmeverluste eines Gebäudes oder Gebäudeteils und
- der niedrigsten Oberflächentemperaturen zur Abschätzung des Risikos einer Tauwasserbildung fest. Diese Spezifikationen enthalten die geometrischen Grenzen, die Unterteilungen des Modells, die wärmetechnischen Randbedingungen und die zu verwendenden wärmetechnischen Kennwerte und Beziehungen.
Dieses Dokument beruht auf folgenden Annahmen:
- alle physikalischen Eigenschaften sind temperaturunabhängig;
- es gibt keine Wärmequellen im Bauteil.
Dieses Dokument kann auch für die Herleitung von längenbezogenen und punktbezogenen Wärme-durchgangskoeffizienten und von Temperaturfaktoren der Oberflächen angewendet werden.
ANMERKUNG Tabelle 1 in der Einleitung zeigt die relative Einordnung dieses Dokuments innerhalb des EPB-Normenpakets im Kontext der in ISO 52000-1 dargelegten modularen Struktur.
Ponts thermiques dans les bâtiments - Flux thermiques et températures superficielles - Calculs détaillés (ISO 10211:2017)
L'ISO 10211:2017 établit les spécifications sur les modèles géométriques tridimensionnels et bidimensionnels d'un pont thermique, pour le calcul numérique:
- des flux thermiques, afin d'évaluer la déperdition thermique globale d'un bâtiment ou d'une partie de bâtiment; et
- des températures superficielles minimales, afin d'évaluer le risque de condensation superficielle.
Ces spécifications incluent les limites du modèle géométrique et ses subdivisions, les conditions aux limites et les valeurs thermiques qui lui sont liées à utiliser.
L'ISO 10211:2017 est basé sur les suppositions suivantes:
- toutes les propriétés physiques sont indépendantes de la température;
- absence de source de chaleur à l'intérieur de l'élément de construction.
L'ISO 10211:2017 peut aussi être utilisé pour la détermination des coefficients linéiques ou ponctuels de transmission thermique, ainsi que pour les facteurs de température superficielle.
NOTE Le Tableau 1 de l'Introduction indique la position relative de l'ISO 10211:2017 dans la série de normes PEB dans le contexte de la structure modulaire définie dans l'ISO 52000‑1.
Toplotni mostovi v stavbah - Toplotni tokovi in površinske temperature - Podrobni izračuni (ISO 10211:2017)
Ta dokument določa specifikacije za tridimenzionalni in dvodimenzionalni
model toplotnega mosta za številski izračun:
– toplotnih tokov za namene ocenjevanja celotne izgube toplote iz stavbe ali njenega dela; in
– najnižjih površinskih temperatur za namene ocenjevanja nevarnosti površinske kondenzacije.
Te specifikacije vključujejo geometrijske omejitve in razdelitve modela, toplotne
mejne pogoje ter toplotne vrednosti in razmerja, ki se uporabljajo.
Ta dokument temelji na naslednjih predpostavkah:
– vse fizične lastnosti so neodvisne od temperature;
– znotraj stavbnega elementa ni nobenih virov toplote.
Ta dokument se lahko uporablja tudi za izpeljavo linearne in točkovne toplotne prehodnosti ter
dejavnikov temperature površine.
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.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 10211:2017
01-september-2017
1DGRPHãþD
SIST EN ISO 10211:2008
7RSORWQLPRVWRYLYVWDYEDK7RSORWQLWRNRYLLQSRYUãLQVNHWHPSHUDWXUH3RGUREQL
L]UDþXQL ,62
Thermal bridges in building construction - Heat flows and surface temperatures -
Detailed calculations (ISO 10211:2017)
Wärmebrücken im Hochbau - Wärmeströme und Oberflächentemperaturen - Detaillierte
Berechnungen (ISO 10211:2017)
Ponts thermiques dans les bâtiments - Flux thermiques et températures superficielles -
Calculs détaillés (ISO 10211:2017)
Ta slovenski standard je istoveten z: EN ISO 10211:2017
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
SIST EN ISO 10211:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 10211:2017
---------------------- Page: 2 ----------------------
SIST EN ISO 10211:2017
EN ISO 10211
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2017
EUROPÄISCHE NORM
ICS 91.120.10 Supersedes EN ISO 10211:2007
English Version
Thermal bridges in building construction - Heat flows and
surface temperatures - Detailed calculations (ISO
10211:2017)
Ponts thermiques dans les bâtiments - Flux thermiques Wärmebrücken im Hochbau - Wärmeströme und
et températures superficielles - Calculs détaillés (ISO Oberflächentemperaturen - Detaillierte Berechnungen
10211:2017) (ISO 10211:2017)
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 10211:2017 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 10211:2017
EN ISO 10211:2017 (E)
Contents Page
European foreword . 3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 10211:2017
EN ISO 10211:2017 (E)
European foreword
This document (EN ISO 10211:2017) 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,
3
---------------------- Page: 5 ----------------------
SIST EN ISO 10211:2017
EN ISO 10211:2017 (E)
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 10211:2007.
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 10211:2017 has been approved by CEN as EN ISO 10211:2017 without any modification.
4
---------------------- Page: 6 ----------------------
SIST EN ISO 10211:2017
INTERNATIONAL ISO
STANDARD 10211
Second edition
2017-06
Thermal bridges in building
construction — Heat flows and surface
temperatures — Detailed calculations
Ponts thermiques dans les bâtiments — Flux thermiques et
températures superficielles — Calculs détaillés
Reference number
ISO 10211:2017(E)
©
ISO 2017
---------------------- Page: 7 ----------------------
SIST EN ISO 10211:2017
ISO 10211:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
---------------------- Page: 8 ----------------------
SIST EN ISO 10211:2017
ISO 10211:2017(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and subscripts . 7
4.1 Symbols . 7
4.2 Subscripts . 7
5 Description of the method . 8
5.1 Output . 8
5.2 General description . 8
6 Output data and input data . 8
6.1 Output data . 8
6.2 Calculation time intervals . 9
6.3 Input data . 9
7 Modelling of the construction . 9
7.1 Dimension systems . 9
7.2 Rules for modelling . 9
7.2.1 General. 9
7.2.2 Cut-off planes for a 3-D geometrical model for calculation of total heat
flow and/or surface temperatures . 9
7.2.3 Cut-off planes for a 2-D geometrical model .11
7.2.4 Cut-off planes in the ground .12
7.2.5 Periodic heat flows via the ground .13
7.2.6 Adjustments to dimensions .13
7.2.7 Auxiliary planes .15
7.2.8 Quasi-homogeneous layers and materials .15
7.3 Conditions for simplifying the geometrical model .15
7.3.1 General.15
7.3.2 Conditions for adjusting dimensions to simplify the geometrical model .16
7.3.3 Conditions for using quasi-homogeneous material layers to simplify the
geometrical model .17
8 Input data specifications .20
8.1 General .20
8.2 Thermal conductivities of materials .21
8.3 Surface resistances .21
8.4 Boundary temperatures .21
8.5 Thermal conductivity of quasi-homogeneous layers .21
8.6 Equivalent thermal conductivity of air cavities .21
8.7 Determining the temperature in an adjacent unheated room .22
9 Calculation method .22
9.1 Solution technique .22
9.2 Calculation rules .22
9.2.1 Heat flows between material cells and adjacent environment .22
9.2.2 Heat flows at cut-off planes .22
9.2.3 Solution of the formulae .22
9.2.4 Calculation of the temperature distribution .23
10 Determination of thermal coupling coefficients and heat flow rate from 3-D calculations 23
10.1 Two boundary temperatures, unpartitioned model .23
10.2 Two boundary temperatures, partitioned model .23
© ISO 2017 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 10211:2017
ISO 10211:2017(E)
10.3 More than two boundary temperatures .24
11 Calculations using linear and point thermal transmittances from 3-D calculations .25
11.1 Calculation of thermal coupling coefficient .25
11.2 Calculation of linear and point thermal transmittances .25
12 Determination of thermal coupling coefficient, heat flow rate and linear thermal
transmittance from 2-D calculations .26
12.1 Two boundary temperatures .26
12.2 More than two boundary temperatures .26
12.3 Determination of the linear thermal transmittance .27
12.4 Determination of the linear thermal transmittance for wall/floor junctions .27
12.4.1 All cases .27
12.4.2 Option A .27
12.4.3 Option B .29
12.5 Determination of the external periodic heat transfer coefficient for ground floors .31
13 Determination of the temperature at the internal surface .32
13.1 Determination of the temperature at the internal surface from 3-D calculations .32
13.1.1 Two boundary temperatures .32
13.1.2 More than two boundary temperatures .32
13.2 Determination of the temperature at the internal surface from 2-D calculations .33
13.2.1 Two boundary temperatures .33
13.2.2 Three boundary temperatures .33
14 Report .33
14.1 Input data .33
14.2 Output data .34
14.2.1 General.34
14.2.2 Calculation of the heat transmission using the thermal coupling coefficient .34
14.2.3 Calculation of the surface temperatures using weighting factors .34
14.2.4 Additional output data .34
14.2.5 Estimate of error .35
Annex A (normative) Input and method selection data sheet — Template .36
Annex B (informative) Input and method selection data sheet — Default choices .38
Annex C (normative) Validation of calculation methods .40
Annex D (normative) Examples of the determination of the linear and point
thermal transmittances.47
Annex E (normative) Determination of values of thermal coupling coefficient and
temperature weighting factor for more than two boundary temperatures .50
Bibliography .55
iv © ISO 2017 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 10211:2017
ISO 10211:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www. iso. org/d irectives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www. iso. org/p atents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o. org/i so/f oreword. html.
ISO 10211 was prepared by ISO Technical Committee ISO/TC 163, Thermal performance and energy use
in the built environment, Subcommittee SC 2, Calculation methods, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 89, Thermal performance of
buildings and building components, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 10211:2007), which has been technically
revised.
The changes in the second edition are mostly editorial. The standard has been re-drafted according
to CEN/TS 16629:2014.
© ISO 2017 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 10211:2017
ISO 10211:2017(E)
Introduction
This document is part of a series aimed at the international harmonization of the methodology for
assessing the energy performance of buildings. Throughout, this series is referred to as a “set of EPB
standards”.
All EPB standards follow specific rules to ensure overall consistency, unambiguity and transparency.
All EPB standards provide a certain flexibility with regard to the methods, the required input data and
references to other EPB standards, by the introduction of a normative template in Annex A and Annex B
with informative default choices.
For the correct use of this document, a normative template is given in Annex A to specify these choices.
Informative default choices are provided in Annex B.
The main target groups for this document are architects, engineers and regulators.
Use by or for regulators: In case the document is used in the context of national or regional legal
requirements, mandatory choices may be given at national or regional level for such specific
applications. These choices (either the informative default choices from Annex B or choices adapted to
national/regional needs, but in any case following the template of Annex A) can be made available as
national annex or as separate (e.g. legal) document (national data sheet).
NOTE 1 So in this case:
— the regulators will specify the choices;
— the individual user will apply the document to assess the energy performance of a building, and thereby use
the choices made by the regulators.
Topics addressed in this document can be subject to public regulation. Public regulation on the same
topics can override the default values in Annex B. Public regulation on the same topics can even, for
certain applications, override the use of this doc
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.