NF EN ISO 6946

NF EN ISO 6946

June 2008
Standard Cancelled

Building components and building elements - Thermal resistance and thermal transmittance - Calculation method

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. 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 6946:2007 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.

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Main informations

Collections

National standards and national normative documents

Publication date

June 2008

Number of pages

37 p.

Reference

NF EN ISO 6946

ICS Codes

91.120.10   Thermal insulation of buildings

Classification index

P50-731

Print number

1 - 11/07/2008

International kinship

European kinship

EN ISO 6946:2007
Sumary
Building components and building elements - Thermal resistance and thermal transmittance - Calculation method

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.

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 6946:2007 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.

Replaced standards (2)
NF EN ISO 6946
November 1996
Standard Cancelled
Building components and building elements. Thermal resistance and thermal transmittance. Calculation method.

NF EN ISO 6946/A1
October 2003
Standard Cancelled
Building components and building elements - Thermal resistance and thermal transmittance - Calculation method

Le présent document modifie les chapitres D.4, D4.1, D 4.2 et D4.3 de la norme de base.

Standard replaced by (1)
NF EN ISO 6946
July 2017
Standard Current
Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods

<p>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.</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 6946:2017 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.</p> <p>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.</p>

Table of contents
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  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes, définitions, symboles et unités
    1
  • 3.1 Termes et définitions
    1
  • 3.2 Symboles et unités
    2
  • 4 Principes
    2
  • 5 Résistance thermique
    3
  • 5.1 Résistance thermique de couches homogènes
    3
  • 5.2 Résistance superficielle
    3
  • 5.3 Résistance thermique des lames d'air
    4
  • 5.4 Résistance thermique des espaces non chauffés
    6
  • 6 Résistance thermique totale
    7
  • 6.1 Résistance thermique totale d'un composant de bâtiment composé de couches homogènes
    7
  • 6.2 Résistance thermique totale d'un composant de bâtiment composé de couches homogènes et hétérogènes
    8
  • 7 Coefficient de transmission thermique
    11
  • Annexe A (normative) Résistance superficielle
    12
  • Annexe B (normative) Résistance thermique des espaces d'air
    15
  • Annexe C (normative) Calcul du coefficient de transmission thermique des composants ayant des couches d'épaisseur variable
    19
  • Annexe D (normative) Corrections du coefficient de transmission thermique
    23
  • Bibliographie
    29
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