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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Window to wall ratio

Annabelle Cruz

Project Leader - LEED & Sustainability

Ted Jacob Engineering Group

LEEDuser Basic Member

0 thumbs up

Project location :

United Arab Emirates

December 18, 2016

Hi. As per Section 5c of Table G3.1 of ASHRAE 90.1-2007, “Vertical fenestration areas for new buildings and additions shall equal that in in the proposed design or 40% of gross above-grade wall area..”. The question is how about if the opaque wall (no window) is totally covered with tinted glass, is it necessary to comply with this Section? Please advice. Thank you.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 12/19/2016 - 02:48

An opaque wall covered in glass is a wall, not a window. All projects must comply.

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