ČSN EN 17871

Glass in building - Spectrophotometric characteristics of glass products - Validation procedure for calculation tool.

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Dostupné prevedenie: Tlačené

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Podrobné informácie

Označenie: ČSN EN 17871

Dátum vydania: 01.07.2024

Stránok: 16

Krajina: Česká technická norma

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Anotácia

This document 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 tools.
The following characteristics are included in the scope of this document:
- 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 document:
- UV transmittance (tuv)
- shading coefficient (SC)
- general colour rendering index (Ra)
- thermal transmittance (U value) at angles other than vertica

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