NF EN ISO 6946

NF EN ISO 6946

July 2017
Standard Current mandatory application standard
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Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods

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.

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Main informations

Collections

National standards and national normative documents

Publication date

July 2017

Number of pages

52 p.

Reference

NF EN ISO 6946

ICS Codes

91.120.10   Thermal insulation of buildings

Classification index

P50-731

Print number

2 - 01/02/2022

International kinship

ISO 6946:2017

European kinship

EN ISO 6946:2017
Sumary
Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods

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.

Replaced standards (1)
NF EN ISO 6946
June 2008
Standard Cancelled
Building components and building elements - Thermal resistance and thermal transmittance - Calculation method

<p>ISO 6946:2007 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.</p> <p>The calculation method is based on the appropriate design thermal conductivities or design thermal resistances of the materials and products for the application concerned.</p> <p>The method applies to components and elements consisting of thermally homogeneous layers (which can include air layers).</p> <p>ISO 6946:2007 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 D. Other cases where insulation is bridged by metal are outside the scope of ISO 6946:2007.</p>

Table of contents
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  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles et indices
  • 5 Description de la méthode
  • 6 Calcul du coefficient de transmission thermique et de la résistance thermique
  • Annexe A (normative) Données d'entrée et fiche technique pour la sélection de la méthode - Modèle
  • Annexe C (normative) Résistances superficielles
  • Annexe D (normative) Résistance thermique des espaces d'air
  • Annexe E (normative) Calcul du coefficient de transmission thermique des composants ayant des couches d'épaisseur variable
  • Annexe F (normative) Correction du coefficient de transmission thermique
  • Annexe B (informative) Données d'entrée et fiche technique pour la sélection de la méthode - Choix par défaut
  • Bibliographie
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