BS EN 12898:2019 Glass in building. Determination of the emissivity

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BS EN 12898:2019

Glass in building. Determination of the emissivity

Status : Current   Published : March 2019



What is this standard about?

This document specifies a procedure for determining the emissivity at room temperature of the surfaces of glass and coated glass.

The emissivity is necessary for taking into account heat transfer by radiation from surfaces at the standard temperature of 283 K in the determination of the U value and of the total solar transmittance of glazing.

The procedure, being based on spectrophotometric regular reflectance measurements at near normal incidence on materials that are non-transparent in the infrared region, is not applicable to glazing components with at least one of the following characteristics:

a) with rough or structured surfaces where the incident radiation is diffusely reflected;

b) with curved surfaces where the incident radiation is regularly reflected at angles unsuitable to reach the detector while using regular reflectance accessories;

c) infrared transparent.

Standard NumberBS EN 12898:2019
TitleGlass in building. Determination of the emissivity
Publication Date22 March 2019
Cross ReferencesEN 410, EN 673, ISO/IEC 17025, EN 675, EN 674
ReplacesBS EN 12898:2001
International RelationshipsEN 12898:2019
DescriptorsGlass, Thermal transmittance, Surface properties, Thermal protection, Emission, Glazing, Construction materials
Title in FrenchVerre dans la construction. Détermination de l'émissivité
Title in GermanGlas im Bauwesen. Bestimmung des Emissionsgrades
ISBN978 0 580 99306 0
File Size695 KB

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