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NC-2009 IEQc6.2:Controllability of Systems—Thermal Comfort

Operable Windows Complaint Area

Profile picture for user gurneet
Gurneet Singh
Director
Environmental Design Solutions Pvt. Ltd.
LEEDuser Expert
13 thumbs up

As per the requirement operable window can be counted as control for all the occupants occupants located within 20 feet of the exterior wall and within 10 feet of either side of the operable part of the window. Also the minimum area of the window opening may be 4% of the net occupiable area and as per the example area 20 feet by 20 feet, the opening size per window would need to be 16 square feet to meet the limits used in this credit. My question is if I have a window less than 16 square then can i take less area as complaint area or I need to provide minimum 16 square feet of window. For example, if I have operable window equal to 10 sqft, then can I take an area of 250 sqft and count as control for all the occupants occupants located in this area.

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Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Tue, 06/25/2013 - 16:49

Gurneet, in my opinion.... maybe.This is prescriptive requirement that is somewhat arbitrary. You might have a good reason for applying it to a slightly different situation, but the point of prescriptive requirements is that they are universally applicable and simple to interpret.Ulimately it's up to USGBC and LEED to interpret this. You could submit the credit with a narrative argument, or get a CIR, or simply contact them for advice on the situation.

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