Published at Sunday, 03 February 2019. Kitchen Window and Ventilation Hood. By Osvald Henriksen.
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.
Moreover, in a house with an atmospherically vented water heater, a 1,200-cfm GE Monogram range hood may cause backdrafting of flue gases, even if the water heater was originally installed in compliance with NFPA and ASHRAE standards. So complying with these standards for water-heater installation won’t keep you out of trouble.
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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