Published at Monday, 28 January 2019. Kitchen Window and Ventilation Hood. By Pedersen Wilda.
If you have a huge family, and you indulge in commercial-scale cooking that requires a powerful exhaust fan, you’ll need to install a powered makeup air unit like those manufactured by Electro Industries of Monticello, Minnesota or Fantech. These units move a lot of air; in winter, the incoming air is cold, but it can be heated with 10,000-watt electric resistance elements if you want. Be prepared to suffer a huge energy penalty. The model EM-WH1025K from Electro Industries will supply 632 cfm at a 50 F° temperature rise. If you want a 1,200-cfm range hood, you’ll need two of these makeup air units; they cost about $1,800 each.
Here’s the new IRC provision, which is found in section M1503.4: “Exhaust hood systems capable of exhausting in excess of 400 cfm shall be provided with makeup air at a rate approximately equal to the exhaust air rate. Such makeup air systems shall be equipped with a means of closure and shall be automatically controlled to start and operate simultaneously with the exhaust system.
Another consideration is location in the room. Curtains should not be near the stove or too close to splash-back from the sink. Judy Soccio of Couture Window Art says to keep treatments over the sink short—and that includes any cords. Think about how much and what you cook, too: If odors and grease are an issue, Judy says, choose washable fabrics or those with Crypton or Microban.
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