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  1. #1
    Join Date
    Oct 2012
    Location
    Shelby NC
    Posts
    129

    Default Can you run a condesing furnace exhaust vertically

    Can you run a condensing furnace exhaust vertically

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  2. #2
    Join Date
    Jun 2008
    Location
    Maryland
    Posts
    1,049

    Default Re: Can you run a condesing furnace exhaust vertically

    Yes. As always with condensing furnaces, proper managing of condensate is very important. A vertical exhaust pipe will certainly allow the condensate to drain back to the condensate management system at the air handler.

    When condensing furnace exhaust pipes are run in a more horizontal manner, the pipe must always slope down hill towards the furnace to allow the condensate to drain into the condensate removal system.


  3. #3
    Join Date
    Feb 2008
    Location
    Chicago IL
    Posts
    1,984

    Default Re: Can you run a condesing furnace exhaust vertically

    Running the furnace vent vertical isn't a problem.
    In this case the problem is the way it was run.
    - Top of vertical vent pipe open, no 90, in this type of install you need a Tee at the bottom with a drain hose to deal with water coming down the pipe
    - top of chimney not properly terminated, this is going to let rain water and snow into the home
    - top of chimney not properly terminated which will allow premature erosion and repair costs
    - top of chimney and chimney in basement not sealed at all, this will allow cold air drafts and critters into the home increasing energy costs
    - the mound of mortar should not be seen as a proper chimney cap, as evident by the algae growth already

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