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

Daylight savings time

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James Geers
Architect, LEED AP, Director of Sustainable Design
SFA Architects Inc.
LEEDuser Basic Member
3 thumbs up

I am assuming the daylight modeling must utilize daylight savings time. Is this correct?

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Thu, 11/13/2014 - 14:27

It doesn't say so in the text and since they chose two times of day that are equally offset from noon, I have always assumed it was standard time.
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TODD REED
Energy Program Specialist
PA DMVA
LEEDuser Expert
626 thumbs up

Thu, 11/13/2014 - 15:17

As Jill has noted, it does not state that it does nor will a reviewer ask whether daylight savings was used or not. I just use standard time, but you may find that when it comes to direct penetration issues that will put you over the 500fc level, your exterior shading my be off due to the time you used to calculate the length of the overhang. This depends on what you have used to calculate the suns positions, be it manual calcs or one of the many modeling programs out there.

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