I am currently running daylight calculations using the prescriptive method on a project with an open plan with large expanses of glazing all around. In most areas, the glazing is floor to ceiling. With this, the window area and the floor area are very close, causing the building to be well above the .180 max compliance. However, we have automatic roller shades throughout. Am I correct to assume that this is acceptable because of the shades? Also, if so, how do you document this for submission? Do we still run the calcs and show our values that are too high, but mention the roller shades?

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TODD REED

Energy Program Specialist

PA DMVA

LEEDuser Expert

626 thumbs up

Tue, 04/22/2014 - 20:22

When you complete the Supplemental Daylight and Views Calculator, in the column that is labeled automated shades, mark yes. This will automatically ignore the exceeded 0.180 limit. To document, provide floor plans indicated the location of the automated shades, the sensors, submit a sequence of operation, and manufacturer info. You still need to complete the calculator and submit everything else.

Jill Perry, PE

Consultant

Jill Perry, LLC

LEEDuser Expert

298 thumbs up

Wed, 04/23/2014 - 15:53

Also, make sure that your shades are view-preserving. This is a somewhat subjective call but I would say that as long as you can still see the general outline and color of objects outside, and people moving around, for example, it is view-preserving. They are not hard to find and even shades with low transmittance (or low openness factor) can be surprisingly view-preserving. An example would be a fabric roller shade with perforations.

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FAQs about IEQc8.1 :

WFR x VLT = much more than 0.180???

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