EN ISO 14683:2007
(Main)Thermal bridges in building construction - Linear thermal transmittance - Simplified methods and default values (ISO 14683:2007)
Thermal bridges in building construction - Linear thermal transmittance - Simplified methods and default values (ISO 14683:2007)
ISO 14683:2007 deals with simplified methods for determining heat flows through linear thermal bridges which occur at junctions of building elements.
ISO 14683:2007 specifies requirements relating to thermal bridge catalogues and manual calculation methods.
Default values of linear thermal transmittance are given in Annex A for information.
Wärmebrücken im Hochbau - Längenbezogener Wärmedurchgangskoeffizient - Vereinfachte Verfahren und Anhaltswerte (ISO 14683:2007)
Diese Internationale Norm behandelt vereinfachte Verfahren zur Bestimmung der Wärmeströme durch linienförmige Wärmebrücken, die an Bauteilverbindungen auftreten.
Sie legt Anforderungen an Wärmebrückenkataloge und Handrechenverfahren fest.
Im Anhang A sind Anhaltswerte des längenbezogenen Wärmedurchgangskoeffizienten zur Information angegeben.
Ponts thermiques dans les bâtiments - Coefficient linéique de transmission thermique - Méthodes simplifiées et valeurs par défaut (ISO 14683:2007)
L'ISO 14683:2007 traite des méthodes simplifiées pour la détermination des flux de chaleur à travers les ponts thermiques linéaires qui se produisent aux jonctions de parois de bâtiments.
L'ISO 14683:2007 établit des exigences concernant les catalogues de ponts thermiques et les méthodes manuelles de calcul.
Des valeurs par défaut des coefficients de transmission thermique linéique sont indiquées dans l'Annexe A pour information.
Toplotni mostovi v stavbah - Linearna toplotna prehodnost - Poenostavljena metoda in privzete vrednosti (ISO 14683:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2008
1DGRPHãþD
SIST EN ISO 14683:2000
Toplotni mostovi v stavbah - Linearna toplotna prehodnost - Poenostavljena
metoda in privzete vrednosti (ISO 14683:2007)
Thermal bridges in building construction - Linear thermal transmittance - Simplified
methods and default values (ISO 14683:2007)
Wärmebrücken im Hochbau - Längenbezogener Wärmedurchgangskoeffizient -
Vereinfachte Verfahren und Anhaltswerte (ISO 14683:2007)
Ponts thermiques dans les bâtiments - Coefficient de transmission thermique linéique -
Méthodes simplifiées et valeurs par défaut (ISO 14683:2007)
Ta slovenski standard je istoveten z: EN ISO 14683:2007
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 14683
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 91.120.10 Supersedes EN ISO 14683:1999
English Version
Thermal bridges in building construction - Linear thermal
transmittance - Simplified methods and default values (ISO
14683:2007)
Ponts thermiques dans les bâtiments - Coefficient linéique Wärmebrücken im Hochbau - Längenbezogener
de transmission thermique - Méthodes simplifiées et Wärmedurchgangskoeffizient - Vereinfachte Verfahren und
valeurs par défaut (ISO 14683:2007) Anhaltswerte (ISO 14683:2007)
This European Standard was approved by CEN on 7 November 2007.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14683:2007: E
worldwide for CEN national Members.
Contents Page
Foreword.3
Foreword
This document (EN ISO 14683:2007) 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 June 2008, and conflicting national standards shall be withdrawn at
the latest by June 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 14683:1999.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 14683:2007 has been approved by CEN as a EN ISO 14683:2007 without any modification.
INTERNATIONAL ISO
STANDARD 14683
Second edition
2007-12-01
Thermal bridges in building
construction — Linear thermal
transmittance — Simplified methods and
default values
Ponts thermiques dans les bâtiments — Coefficient linéique de
transmission thermique — Méthodes simplifiées et valeurs par défaut
Reference number
ISO 14683:2007(E)
©
ISO 2007
ISO 14683:2007(E)
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ii © ISO 2007 – All rights reserved
ISO 14683:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms, definitions, symbols and units .1
3.1 Terms and definitions .1
3.2 Symbols and units.2
3.3 Subscripts .2
4 Influence of thermal bridges on overall heat transfer.3
4.1 Transmission heat transfer coefficient .3
4.2 Linear thermal transmittance .3
4.3 Internal and external dimensions.4
5 Determination of linear thermal transmittance.4
5.1 Available methods and expected accuracy .4
5.2 Numerical calculations.4
5.3 Thermal bridge catalogues .4
5.4 Manual calculation methods.5
5.5 Default values of linear thermal transmittance.5
Annex A (informative) Default values of linear thermal transmittance.6
Annex B (informative) Example of the use of default values of linear thermal transmittance in
calculating the heat transfer coefficient.19
Bibliography .23
ISO 14683:2007(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 14683 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the
built environment, Subcommittee SC 2, Calculation methods.
This second edition cancels and replaces the first edition (ISO 14683:1999), which has been technically
revised.
The following principal changes have been made to the first edition:
⎯ the Scope has been amended to remove the restriction on window and door frames and curtain walling,
and specifies that the default values of linear thermal transmittance are provided for information;
⎯ 5.2 is a new subclause replacing some elements previously contained in 4.2;
⎯ 5.5 is a summary into a short text of the former 5.4, the remainder of which has been transferred into
informative Annex A;
⎯ Annex A contains values of linear thermal transmittance which have all been reviewed, many of them
amended upwards as a result of changing the basis in Table A.1 (intermediate floor slabs thickness of
200 mm instead of 150 mm; frames in openings of thickness 60 mm instead of 100 mm).
iv © ISO 2007 – All rights reserved
ISO 14683:2007(E)
Introduction
This International Standard provides the means (in part) to assess the contribution that building products and
services make to energy conservation and to the overall energy performance of buildings.
Thermal bridges in building constructions give rise to changes in heat flow rates and surface temperatures
compared with those of the unbridged structure. These heat flow rates and temperatures can be precisely
determined by numerical calculation in accordance with ISO 10211. However, for linear thermal bridges, it is
often convenient to use simplified methods or tabulated values to obtain an estimate of their linear thermal
transmittance.
The effect of repeating thermal bridges which are part of an otherwise uniform building element, such as wall
ties penetrating a thermal insulation layer or mortar joints in lightweight blockwork, needs to be included in the
calculation of the thermal transmittance of the building element concerned, in accordance with ISO 6946.
Although not covered by this International Standard, it is worth noting that thermal bridges can also give rise to
low internal surface temperatures, with an associated risk of surface condensation or mould growth.
INTERNATIONAL STANDARD ISO 14683:2007(E)
Thermal bridges in building construction — Linear thermal
transmittance — Simplified methods and default values
1 Scope
This International Standard deals with simplified methods for determining heat flows through linear thermal
bridges which occur at junctions of building elements.
This International Standard specifies requirements relating to thermal bridge catalogues and manual
calculation methods.
Default values of linear thermal transmittance are given in Annex A for information.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 7345, Thermal insulation — Physical quantities and definitions
ISO 10211, Thermal bridges in building construction — Heat flows and surface temperatures — Detailed
calculations
3 Terms, definitions, symbols and units
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7345 and the following apply.
3.1.1
linear thermal bridge
thermal bridge with a uniform cross section al
...
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