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  1. #1
    Kenneth Jahn's Avatar
    Kenneth Jahn Guest

    Unhappy furnace vent prblem

    I have a problem getting a proper draft during high wind. Is there an attachment for the end of the intake pipe to prevent the wind from causing no vent? Thank you

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  2. #2
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,847

    Default Re: furnace vent prblem

    Quote Originally Posted by Kenneth Jahn View Post
    I have a problem getting a proper draft during high wind. Is there an attachment for the end of the intake pipe to prevent the wind from causing no vent? Thank you
    Drafting problems or back drafting are usually associated with the flue pipe not being tall enough above the roof; too close to another object like a ridge peak or wall; Distance of flue pipe is too long; etc.... Another cause can be the lack of proper combustion air.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,246

    Default Re: furnace vent problem

    Quote Originally Posted by Kenneth Jahn View Post
    Is there an attachment for the end of the intake pipe ...
    I kept reading this and presuming it was a direct vent (i.e., the "intake pipe"), but I now suspect this is a Type B gas vent and the "intake pipe" is at the draft hood ... so, based on that ...

    In addition to what Scott said: insufficient slope of horizontal section; horizontal section greater than allowed in relation to the height above the draft hood; use of a regular Type B gas vent cap instead of a high wind style Type B gas vent cap (there is a difference); no draft hood being used; and I am sure there could be other causes as well.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

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