Published at Wednesday, 30 January 2019. Kitchen Window and Ventilation Hood. By Osvald Henriksen.
GE went out of its way to advise range-hood installers of the best way to install a water heater or a furnace — that is, by following ASHRAE standards. Why didn’t GE bother to tell range-hood installers that ASHRAE also has something to say about the best way to install a range hood?
Broan recommends installing an outdoor air duct connected to a grille mounted on the kitchen wall or connected directly to the return plenum of your furnace; the motorized damper is installed in the duct. One 8-inch-diameter duct works for a range hood rated up to 1,000 cfm. If your range hood is bigger than that, you’ll need two ducts.
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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