bathroom light heater fan combo

Discussion in 'Remodel Forum & Blog' started by Gfro, May 11, 2009.

  1. Gfro

    Gfro New Member

    May 11, 2009
    Hi- I would like to vent one of these thru an existing 2" hole in the roof if possible. Can/ should this be done? thanks......
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Most of the systems use a 3" duct, some use 4" and some even larger. So, to direct it through a 2" hole would not be a good idea. You also want that penetration to have some kind of termination to prevent rain/snow/etc. from coming down the pipe and dripping into the room. You should not normally combine this output with anything else (like a sewer vent), either. You may be able to enlarge the opening, depending on what it is currently used for to accommodate the (new?) use.
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  4. frenchie

    frenchie Jack of all trades

    Dec 30, 2006
    Brooklyn, NY and Fire Island, NY

    Out of curiosity - what's in the hole right now, what was it for originally?
  5. Gfro

    Gfro New Member

    May 11, 2009
    originally it was an old vent pipe. My neighbor already talked me out of the idea. My husband died 3 months ago and I am working on this house alone now.It's a diversion but it's also stressful. Thanks....
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