NF EN ISO 6946
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.
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.
Le présent document modifie les chapitres D.4, D4.1, D 4.2 et D4.3 de la norme de base.
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.
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes, définitions, symboles et unités1
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3.1 Termes et définitions1
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3.2 Symboles et unités2
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4 Principes2
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5 Résistance thermique3
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5.1 Résistance thermique de couches homogènes3
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5.2 Résistance superficielle3
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5.3 Résistance thermique des lames d'air4
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5.4 Résistance thermique des espaces non chauffés6
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6 Résistance thermique totale7
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6.1 Résistance thermique totale d'un composant de bâtiment composé de couches homogènes7
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6.2 Résistance thermique totale d'un composant de bâtiment composé de couches homogènes et hétérogènes8
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7 Coefficient de transmission thermique11
- Annexe A (normative) Résistance superficielle12
- Annexe B (normative) Résistance thermique des espaces d'air15
- Annexe C (normative) Calcul du coefficient de transmission thermique des composants ayant des couches d'épaisseur variable19
- Annexe D (normative) Corrections du coefficient de transmission thermique23
- Bibliographie29
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