Results 1 to 5 of 5

Thread: Fireplace odor

  1. #1
    Richard Roshak's Avatar
    Richard Roshak Guest

    Default Fireplace odor

    I received a call today from a homeowner of a 25 year old townhouse. House has two masonry fireplaces (one on first floor one on second floor), fireplace has been used only once. Just within the past two weeks there is a fireplace strong odor. I asked if anything has changed and her response was the heating system. Old unit has been replaced with a 90% unit. At this time without going to the home, I have no idea if the flue which is being used by the water heater has been relined now that the heating unit has been removed. I'm thinking for some reason the pressure has changed in the home. Anybody have ideas?

    Similar Threads:
    Certified Master Inspector CMI

  2. #2
    Join Date
    Feb 2008
    Caledon, Ontario

    Default Re: Fireplace odor

    My guess is that the old furnace was vented into a common flue which also served the fireplace. Since a new high efficiency furnace has been installed and may not use the flue, cold air being heavy is now falling down the cold chimney, thus the fireplace odour. But then again once you return you maybe able to provide us further info that would assist in a diagnoses.


    The value of experience is not in seeing much, but in seeing wisely.

  3. #3
    Join Date
    Aug 2007
    Memphis TN.

    Default Re: Fireplace odor

    Quote Originally Posted by Richard Roshak View Post

    strong odor

    Anybody have ideas?

    A used discarded pair of.....


    ***IMPORTANT*** You Need To Register To View Images ***IMPORTANT*** You Need To Register To View Images
    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  4. #4
    Join Date
    Mar 2007

    Default Re: Fireplace odor

    I agree that it's a negative pressure problem. New furance, different fan speed, more air moving through the ductwork, if there's a hole somewhere more air is now being pushed outside - result is more air being sucked down the chimney(s) into the house resulting in the 'fireplace smell'

    It could also be that the new installers left a gap in the ductwork (assuming it's outside of the house in a garage or basement) and now there is a negative pressure. The first thing I'd do is look over the install very carfully and look for air leakage anywhere they distrubed things.

  5. #5
    Richard Pultar's Avatar
    Richard Pultar Guest

    Default Re: Fireplace odor

    Many 90 plus furnaces Installers do not connect the supply opening directly to the outside.
    I could imagine the makeup air being drawn from a chimney.
    I would guess that the latent heat from the old furnace kept the flue dry and warm so as to maintain a draft..
    But that makes no seance if it's B vent..


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts