Published at Monday, 28 January 2019. Kitchen Window and Ventilation Hood. By Pedersen Wilda.
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.
As a stop-gap measure, a homeowner with backdrafting problems can open a window near the kitchen every time the range-hood fan is turned on. Although this solution works, it won’t satisfy most homeowners, and builders who suggest this remedy may still be legally liable for future backdrafting problems.
While these by-products may simply sound like nuisances, studies have shown that cooking without proper ventilation is one cause of poor indoor air quality that can negatively affect your health. That's why the International Residential Code and the U.S. Environmental Protection Agency strongly advise homeowners to install a vent hood to capture, filter, and then expel the fumes outside through a vent in an exterior wall or on the roof.
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