Bathroom Exhaust Fan not sucking Air out:

Mr. Will.
by Mr. Will.
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I tested the suction by using a Kleenex and the fan would not pull the Air out. Went up into Attic and the Exh. Vent was never vented out side. Bathroom Specialist. There's a 4" Exhaust vent going out Roof about 10' away, can I add the unvented Fan to the existing one or do I have to vent separately?
  6 answers
  • LandlightS LandlightS on Apr 03, 2012
    I would vent it separately. Also, I don't think code would permit adding to the existing vent
  • Designs by BSB Designs by BSB on Apr 03, 2012
    Take a look at FANTECH systems, they utilize a fan for 2 different rooms.
  • HandyANDY - Handyman & All Repairs, LLC HandyANDY - Handyman & All Repairs, LLC on Apr 03, 2012
    Vent it separately and run it to a soffit vent. You probably want to insulate the vent pipe and metal duct work...fairly easy to do.
  • Mr. Will. Mr. Will. on Apr 04, 2012
    Thanks for your Help!!! Will B.
  • Hewitt Remodeling Services LLC Hewitt Remodeling Services LLC on Apr 06, 2012
    Will, Good inputs thus far. Only want to add that the fan should at least hold a tissue regardless of where it is vented. I'd look at upgrading the fan and correcting the vent discharge. Tim
  • John John on Jan 26, 2021

    I have two bath exhaust fans that do not suck air out but blow air in, what is the problem?
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