Published at Sunday, 03 February 2019. Kitchen Window and Ventilation Hood. By Osvald Henriksen.
I got a copy of the GE Monogram installation instructions, and discovered that they were remarkably unhelpful. Astonishingly, the instructions make no mention of the range hood’s requirement for makeup air. The issue was deflected by a confusing reminder that combustion appliances require adequate combustion air: “Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuelburning equipment to prevent backdrafting.”
If you prefer to install a passive makeup air duct rather than a powered makeup air unit, the duct must include a motorized damper that is wired to come on simultaneously with the range-hood fan. Broan sells motorized dampers for this purpose, and also provides detailed and useful installation instructions.
Armed with the limited recommendations provided by GE’s installation instructions, I sought more information by placing two calls to the GE Answer Center (800-626-2000), asking, “Does GE have any recommendations on providing makeup air for a 1,200-cfm GE range hood installed in a residential kitchen?” The first GE expert responded, “What is makeup air?” An explanation was provided. She responded, “Do you mean you want to know the cfm of the fan?” After further discussion, I was put on hold. A few minutes later, the expert returned to the phone to report, “That information is not something we would have here.”
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