prBAS EN 17871:2025
Glass in building - Spectrophotometric characteristics of glass products - Validation procedure for calculation tool.
General information
Status:Project
Number of pages:10
Adoption method:Proglašavanje
Language:engleski
Edition:1.
Realization date:14.10.2024
Forseen date for next stage code:30.11.2024
Technical committee:BAS/TC 36, Architectural constructions, technology and construction management and building physics
Directives:
305/2011, Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
ICS:
81.040.20, Glass in building
Abstract
This standard provides a procedure to validate a calculation tool of spectrophotometric and thermal characteristics of the glass products following EN 410 or EN 673. It provides also the methodology to correctly use measured data in the calculation tool.
The following characteristics are included in the scope of this standard:
- light transmittance (tv)
- light reflectance - both sides (rv, r'v)
- solar direct transmittance (te)
- solar direct reflectance – both sides (re, r'e)
- total solar energy transmittance (solar factor or g value) (g)
- thermal transmittance (U value) in the vertical position
The following characteristics are excluded from the scope of this standard:
- UV transmittance (tuv)
- shading coefficient (SC)
- general colour rendering index (Ra)
- thermal transmittance (U value) at angles other than vertical
Lifecycle
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Original document and degree of correspondence
EN 17871:2024, identical
Work material
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