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40% of walls?

Mr. Inspector

Mr. Inspector

SAWHORSE
Joined
Nov 28, 2009
Messages
4,690
Location
Poconos/eastern PA
IECC 502.3.1 and Table 502.3 says fenestration can not be more than 40% of the wall. Does this mean 40% of the one wall and the windows on that one wall or 40% of the total sq. ft. of all the walls and all the windows?
 
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