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NC-2009 IEQc8.1:Daylight and Views—Daylight

LT, VLT & Tvis

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Biagio Arevalo
Management Consultant LEED AP BD+C, PMP
Green Building & LEED
LEEDuser Basic Member
21 thumbs up

I´m planning to approach this credit through the prescriptive path but I´ve been having some difficulties finding the Tvis for the glass. The manufacturer is providing me the spectrophotometric characteristics of the glass which contain the LT%, RLe% and RLi%. Does anyone know if the LT is the same VLT?

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Tue, 03/08/2011 - 16:09

If the product data sheet does not list VLT anywhere and the LT values are between 15 and 70% or so, I would assume this is the light transmission value. I'm guessing that RLe% and RLi% is reflected light (exterior) and reflected light (interior).
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Eddy Santosa
Director of Sustainability
DBR Engineering Consultants
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Wed, 03/09/2011 - 00:19

I will suggest to call the manufacturer or check in Window 5 database.

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