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Thread: Mystery duct

  1. #1
    Join Date
    Jan 2014
    Location
    UT
    Posts
    12

    Default Mystery duct

    Long time reader, first time poster. I came upon a standard propane mid efficiency furnace yesterday that had a large duct coming from the supply duct looping back into the return air plenum below the furnace. This duct was about 3 feet long and was probably a 10 inch vent. It had a manual damper which dropped open when the system fired up. I asked my (more experienced) boss if he had seen anything like this before. I have done over 1000 inspections and he has done 1000's more than me. Neither of us could figure out its purpose????
    And, of course, my image is unable to be resized to post the picture. Any suggestions in the mean time while I figure out how to post the picture. Thanks for any insight.....

    Inspection Referral

  2. #2
    Join Date
    Mar 2007
    Location
    Orlando, FL
    Posts
    1,340

  3. #3
    Join Date
    Dec 2007
    Location
    Holladay, UT
    Posts
    565

    Default Re: Mystery duct

    Before I saw Dom's reply I was thinking the same thing. Is the system zoned?

    Tom Rees / A Closer Look Home Inspection / Salt Lake City, Utah

  4. #4
    Join Date
    Mar 2007
    Location
    Kalamazoo, MI
    Posts
    117

    Question Re: Mystery duct

    Was there a humidifier attached at one time?

    RJDalga
    http://homeanalysts.com
    Kalamazoo, MI

  5. #5
    Join Date
    Mar 2007
    Location
    South-West Michigan
    Posts
    469

    Talking Re: Mystery duct

    Any chance there is a photograph of this mysterious beast?

    Randall Aldering GHI BAOM MSM
    Housesmithe Inspection
    www.housesmithe.com

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