NEN-EN 673:2011 en

Glas voor gebouwen - Bepaling van de warmtedoorgangscoëfficiënt (U-waarde) - Berekeningsmethode

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Over deze norm

Status Definitief
Aantal pagina's 18
Commissie Vlakglas
Gepubliceerd op 01-02-2011
Taal Engels
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.


ICS-code 81.040.20
Nederlandse titel Glas voor gebouwen - Bepaling van de warmtedoorgangscoëfficiënt (U-waarde) - Berekeningsmethode
Engelse titel Glass in building - Determination of thermal transmittance (U value) - Calculation method



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