Published at Sunday, 03 February 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?
So where does a powerful range-hood fan get its makeup air? If the house doesn’t have enough random air leaks around windows, doors, and mudsills, the makeup air is often pulled backwards through water-heater flues or down wood-burning chimneys — a phenomenon called backdrafting. Since the flue gases of some combustion appliances can include carbon monoxide, backdrafting is dangerous. In some cases, it can be life-threatening.
General Electric was marketing its 1,200-cfm range hoods to residential customers. In fact, a GE Monogram press release bragged that the appliance could be installed anywhere: “The ventilation system operates at maximum venting capacity of 1,200 cubic feet per minute to keep the kitchen free of fumes and odors. Beautifully finished on all sides, the new Monogram island hood lends elegance to any kitchen.”
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