Hi, We are taking 3rd option, measurement to show compliance with the credit requirements. The text of the credit does not postulate when a regularly occupied area can be considered daylit (for instance, distance from window to the room is given as 15 feet in Lighting Controls credit EAc.1.2). Does anyone have an idea what is the threshold? Many thanks. Update: actually, I have found the answer. http://lightingcontrolsassociation.org/content/whitepapers/daylight-zones-sidelighted-spaces/ this link contains info on how ASHRAE/IES 90.1-2010 defines daylit spaces.

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TODD REED

Energy Program Specialist

PA DMVA

LEEDuser Expert

626 thumbs up

Mon, 06/27/2016 - 13:48

For this credit, the entire square footage of any space designated as regularly occupied must have measurements taken on at least a 10 foot grid. So if you have a space that is 100 feet deep, you will need at least 10 measurement points from the window wall. You cannot use the argument of what is considered a daylit zone.

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