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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

U-values and SHGC

Henrique Mendes

Mr.

Green Domus | Desenvolvimento Sustentável

LEEDuser Basic Member

13 thumbs up

September 24, 2012

USGBC is saying that the fenestration assembly U-value and SHGC value must be modeled at 4.26 and 0.25, we are changing the fenestration characteristcs in order to get as close to those values as possible. We got U-Value of 4.25 is it acceptable? For SHGC value we got the 0.25. The same issue is on the U-values for the exterior wall and roof construction, which should be modeled (at baseline) with assembly values of 0.273 and 0.705 respectively. We got 0.271 and 0.704. Do they accept those values? We are not getting the exat number in our modeling program.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 09/24/2012 - 22:43

Those values should be acceptable to the reviewer.

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