Range Hoods

Regarding requirements for kitchen exhaust make-up air, the International Residential Code (IRC) section 1503 and the International Mechanical Code (IMC) section 505 state that “systems capable of exhausting in excess of 400 cfm shall be mechanically or passively provided with make-up air at a rate approximately equal to the exhaust air rate” (some states or cities amend this level at which make-up air is required). The code language is not clear on which rating should be used to determine the range hood’s capability.

Broan recommends that the HVI-certified, standard 0.1” static pressure cfm rating should be used to determine if make-up air is required.

Customers/installers should always check with their local jurisdiction for specific make-up air requirements and code amendments that are applicable in their area.