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Thread: Gas furnace

  1. #1
    allen elliott's Avatar
    allen elliott Guest

    Default Gas furnace

    Any Ideas on what caused the soot around the vent. The picture was taken from the bottom side of the flue. It is an upflow furnace located inside an interior closet. It is fueled by propane. Thanks for the input.

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  2. #2
    Join Date
    Mar 2007
    Location
    Plano, Texas
    Posts
    4,245

    Default Re: Gas furnace

    Sorry, can't tell much from your picture, got any more? Bigger?
    Soot is usually (if not always) caused by incomplete combustion.
    Was there plenty of combustion and makeup air?
    Did any other appliances or the return air of the furnace itself upset the apple cart with all the doors to the equipment closed?
    Is the flue open and sized correctly?

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  3. #3
    allen elliott's Avatar
    allen elliott Guest

    Default Re: Gas furnace

    I am leaning toward the vent. It did not meet the 2-3-10 rule. It was very short and next to a wall on the roof.


  4. #4
    Join Date
    Mar 2007
    Location
    Fletcher, NC
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    28,042

    Default Re: Gas furnace

    Quote Originally Posted by allen elliott View Post
    I am leaning toward the vent. It did not meet the 2-3-10 rule. It was very short and next to a wall on the roof.
    "Vents" do not have to meet that rule.

    By the way, it is also not 2-3-10, it is 3-2-10 for chimneys.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  5. #5
    Steve Lowery's Avatar
    Steve Lowery Guest

    Default Re: Gas furnace

    What does the 3 refer to?


  6. #6
    Join Date
    Mar 2007
    Location
    Fletcher, NC
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    28,042

    Default Re: Gas furnace

    For chimneys:

    3 feet high minimum (on sloped roofs you measure the height on the high side of the slope).

    2 feet minimum height above any part of any structure within 10 feet.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

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