Forum discussion
CS-2009 EAp2: Minimum Energy Performance
Hello,
This credit requires us to comply with the U-values prescribed by ASHRAE Standard 90.1-2007.
Our project has a Glass skylight covering more than 5% of the roof. The U-values prescribed by ASHRAE are only for skylights covering from 0% to 2% of the roof or 2.1% to 5% of the roof.
As such, could anybody tell me what are the U-values requirements for glass skylight with curbs covering more than 5 % of the roof ?
What about glass skylight without curb ?
Thank you for your help.
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
April 1, 2010 - 8:48 am
George, I think this question has been answered in a comment by Roger Chang over on the NC EAp2 page. In short, demonstrate compliance either with a trade-off or a whole-building energy simulation.