GLASS IN BUILDING - DETERMINATION OF THERMAL TRANSMITTANCE (U VALUE) - CALCULATION METHOD

Published date

01-12-2013

Publisher

Foreword
1 Scope
2 Normative references
3 Symbols
4 Definitions
5 Basic formulae
6 Basic material properties
7 External and internal heat transfer coefficients
8 Declared values: standardized boundary conditions
9 Expression of the results
10 Test report
Annex A (normative) Determination of normal and
corrected emissivity
Annex B (normative) Iteration procedure for glazing
with more than one gas space
Annex C (informative) Bibliography

Specifies a calculation method to determine the thermal transmittance of glazing with flat and parallel surfaces. Applicable to uncoated glass (including glass with structured surfaces, e.g. patterned glass), coated glass and materials not transparent in the far infrared, which is the case for soda lime silicate glass products (called hereafter soda lime glass), borosilicate glass and glass ceramic. Also applicable to multiple glazing comprising such glasses and/or materials.

DevelopmentNote	Indice de classement: P78-460. (09/2002) PR NF EN 673 October 2010. (10/2010)
DocumentType	Standard
PublisherName	Association Francaise de Normalisation
Status	Current

Standards	Relationship
EN 673:2011	Identical
UNE-EN 673:2011	Identical
UNI EN 673 : 2011	Identical
DIN EN 673:2011-04	Identical
BS EN 673:2011	Identical
I.S. EN 673:2011	Identical

NFF 31 250 : 2013	RAILWAY ROLLING STOCK - LAMINATED GLASS
NF EN 1096-4 : 2005	GLASS IN BUILDING - COATED GLASS - PART 4: EVALUATION OF CONFORMITY/PRODUCT STANDARD
NFP 78 470 : 2015	GLASS IN BUILDING - CALCULATION OF THE TEMPERATURES OF COMPONENTS AND THE FORCES IN SEALS FOR INSULATING GLASS UNITS WITHOUT SOLAR PROTECTION
NF EN 1279-3 : 2003	GLASS IN BUILDING - INSULATING GLASS UNITS - PART 3: LONG TERM TEST METHOD AND REQUIREMENTS FOR GAS LEAKAGE RATE AND FOR GAS CONCENTRATION TOLERANCES
NFF 31 314 : 2013	RAILWAY ROLLING STOCK - INSULATING GLASS UNITS
NFF 31 129 : 2013	RAILWAY ROLLING STOCK - TOUGHENED SAFETY-GLASS PANELS