Published at Wednesday, 30 January 2019. Kitchen Window and Ventilation Hood. By Osvald Henriksen.
Buy a range hood with a small exhaust fan; for most homes, 150 cfm to 250 cfm is plenty. In a tight house, a stronger exhaust fan can cause problems with backdrafting. Most building codes (for example, Section M1507 of the 2006 IRC) require that kitchen range hoods have a minimum rating of 100 cfm. Broan makes a simple range hood (the 40000 series) rated at 160 cfm; you can find it in stainless steel for only $80 on the Web.
ASHRAE’s residential ventilation standard, ASHRAE 62.2, limits exhaust fans to a maximum of 15 cfm per 100 square feet of occupiable space, unless a backdrafting test is performed. According to this standard, the smallest home in which a 1,200-cfm range hood could be installed without verifying makeup air needs would be one measuring 8,000 square feet — a very large McMansion indeed.
If your heart is set on a stainless hood, and feel a custom wood range hood would be mutually exclusive, consider the solution shown above! The stainless range hood is complemented by the enclosure overhead, which encases the duct work, resulting in a harmonious and fitting combination.
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