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NC-2009 EAp2: Minimum Energy Performance

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Window to wall ratio

Project location: United Arab Emirates

December 18, 2016

Annabelle Cruz

Project Leader - LEED & Sustainability
Ted Jacob Engineering Group

LEEDuser Basic Member

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

5912 thumbs up

December 18, 2016 - 9:48 pm

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

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