UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close

NEN-EN 673

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

active, Most Current
Organization: NEN
Publication Date: 1 February 2011
Status: active
Page Count: 22
ICS Code (Glass in building): 81.040.20
scope:

This European Standard specifies a calculation method to determine the thermal transmittance of glazing with flat and parallel surfaces. This European Standard applies 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 glass products, borosilicate glass and glass ceramic. It applies also to multiple glazing comprising such glasses and/or materials. It does not apply to multiple glazing which include in the gas space sheets or foils that are far infrared transparent. The procedure specified in this European Standard determines the U value1) (thermal transmittance) in the central area of glazing. The edge effects due to the thermal bridge through the spacer of a sealed glazing unit or through the window frame are not included. Furthermore, energy transfer due to solar radiation is not taken into account. The effects of Georgian and other bars are excluded from the scope of this European Standard.

Document History

NEN-EN 673
February 1, 2011
Glass in building - Determination of thermal transmittance (U value) - Calculation method
This European Standard specifies a calculation method to determine the thermal transmittance of glazing with flat and parallel surfaces. This European Standard applies to uncoated glass (including...
July 1, 2010
Glass in building - Determination of thermal transmittance (U value) - Calculation method
This European Standard specifies a calculation method to determine the thermal transmittance of glazing with flat and parallel surfaces. This European Standard applies to uncoated glass (including...
February 1, 2003
Glass in building - Determination of thermal transmittance (U value) - Calculation method
A description is not available for this item.
June 1, 2002
Glass in building - Determination of thermal transmittance (U value) - Calculation method
A description is not available for this item.
November 1, 2000
Glass in building - Determination of thermal transmittance (U value) - Calculation method
A description is not available for this item.
December 1, 1997
Glass in building - Determination of thermal transmittance (U value - Calculation method
Specifies a calculation method to determine the thermal transmittance of glazing with flat and parallel surfaces. This standard applies to uncoated glass (including glass with structured surfaces,...
March 1, 1992
Thermal insulation of glazing - Calculation rules for determining the steady state "U" value (thermal transmittance) of glazing
Specifies a calculation method to determine the thermal transmittance of glazing with flat and parallel surfaces. This standard applies to uncoated glass (including glass with structured surfaces,...
Advertisement