Forum discussion

NC-v4 EQc8:Quality views

Visible Light Transmittance

Will specing a low (40%>) VLT  in vision glazing as a glare control measure affect this credit?

Thanks.

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Fri, 08/10/2018 - 18:22

Specing a low VLT glass as your glare control device is not allowed. Glazing cannot be the glare control device. Now, can a low VLT glazing effect this credit in regards to achievement, yes and no. It depends on the climate, amount of glazing, and the size of the space. 

Mon, 08/13/2018 - 14:54

Thanks for the response. Where can I find guidance on whether or not it will affect the credit? I don't see any mention in the credit requirements.

Wed, 08/15/2018 - 16:35

If 100% of a room meets the sDA requirement and 80% fails to meet the ASE requirement, will the 20% the satisfies this credit be counted or is the entire room eliminated? I ask because the daylight calculator if not account for the area failing to meet for the ASE requirement. Thanks. 

Wed, 08/15/2018 - 17:07

Read IES LM 83. It is the document that is that basis for the requirements. 

Wed, 08/15/2018 - 17:14

As noted in in IES LM 83, any space with an ASE of 10% more does not meet the requirements. Therefore, the room is not counted towards compliance.

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