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  1. #1
    Join Date
    Jun 2011
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    Vent options for wolf range and vent

    We purchased a 48" wolf Range and hood. Our only option to vent external is between the wall studs down to under house into crawl space and through outside wall.

    I have a 1200CFM inline vent.


    How much CFM am I going to loose by going from 10" round to 3 1/2 x 14 rectangle and back to 10" round under the house. The total run of the rectangle is about 72" with a 90 degree and about 15 feet of 10" round.

    Anyone ever vented range hood this way?

  2. #2
    Join Date
    Aug 2005
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    does your range have a broiler? lots of smoke and grease off of a broiler.

    call wolf they are very helpful and they will be willing to assist you with this.

  3. #3
    Join Date
    May 2011
    Las Vegas, Nevada
    Post Likes
    I have seen this done before in certain situations. You need to check with your local building department to varify it is allowed by your local code. Before you call the building department you need to call the manufacturers technical support.

    10" round duct = 400 cfm
    3 1/2" X 14" rectangular duct = 150 cfm

    Ideally the duct run should be as short as possible with as few turns as possible to reduce the build up of grease. On average most people fail to clean the grease filters on the hood often enough. Ductwork size is based on the friction of the moving air versus the duct itself and the blowers ability to counter this friction. I think the 3 1/2" X 14" duct will be the limiting factor of the system.

    Hope this helps.
    "Quality is never an accident; it is always the result of intelligent effort. The bitterness of poor quality lingers long after the sweetness of low price is forgotten" --- John Ruskin

  4. #4
    Join Date
    Jan 2007
    N.E. Ok.
    Post Likes
    It needs make up air.
    Or open a window when you run it.

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