NF EN 673

NF EN 673

November 2024
Standard Current

Glass in building - Determination of thermal transmittance (U value) - Calculation method

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Main informations

Collections

National standards and national normative documents

Publication date

November 2024

Number of pages

23 p.

Reference

NF EN 673

ICS Codes

81.040.20   Glass in building

Classification index

P78-460

Print number

1

European kinship

EN 673:2024
Replaced standards (1)
NF EN 673
April 2011
Standard Cancelled
Glass in building - Determination of thermal transmittance (U value) - Calculation method

Le présent document spécifie une méthode de calcul du coefficient de transmission thermique des vitrages à surfaces planes et parallèles.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles, nombres sans dimension et indices
  • 5 Formules de base
  • 6 Propriétés fondamentales des matériaux
  • 7 Coefficients de transfert thermique extérieur et intérieur
  • 8 Valeurs déclarées : conditions limites normalisées
  • 9 Expression des résultats
  • 10 Rapport
  • A Procédure d'itération pour les vitrages isolants comportant plus d'une lame de gaz
  • B Détermination des propriétés des gaz à différentes températures
  • Bibliographie
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