When calculating the amount of daylight (via the prescriptive method) that enters through a south-facing window that utilizes sun shades, how does one account for the added shading benefit in order to differentiate the number from an unobstructed window?

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Eddy Santosa

Director of Sustainability

DBR Engineering Consultants

LEEDuser Basic Member

244 thumbs up

Mon, 11/05/2012 - 16:51

Dan, You should use other methods to account exterior shading devices. If you incorporate view-preserving automated shades for glare control, you can demonstrate compliance for only the minimum 10 fc (108 lux) illuminance level.

Dan Bielenin

William Rawn Associates

LEEDuser Basic Member

0 thumbs up

Mon, 11/05/2012 - 17:01

The rooms in question would be using an external louver solar shading system. Does this mean that we would need to calculate these particular spaces via a daylight simulation model?

Jill Perry, PE

Consultant

Jill Perry, LLC

LEEDuser Expert

298 thumbs up

Mon, 11/05/2012 - 17:05

Yes

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Accounting for Sun Shades in the Prescriptive Method

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