Make-up Air Code

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Buckley Rumford Fireplaces
Make-up Air Code
10/8/15

Section M1503.4 of the 2012 International Residential Code (IRC):
M1503.4 Makeup air required. Exhaust hood systems capable of exhausting in excess of 400 cubic feet per minute (0.19 m3/s) shall be provided with makeup air at a rate approximately equal to the exhaust air rate. Such makeup air systems shall be equipped with a means of closure and shall be automatically controlled to start and operate simultaneously with the exhaust system.