Results 1 to 2 of 2
  1. #1
    Join Date
    Nov 2010
    Location
    Safety Harbor, FL
    Posts
    68

    Default Gas fireplace flue (chase) clearance above roof

    Does anyone know if the clearance standards are the same for a natural gas fireplace flue (chase) as they are for a wood burning fireplace?

    The metal flue I inspected extends 3 feet above the roof line however it sits within 10' of a second floor dormer which towers above the flue by at least 8 feet. Not sure if the same clearance requirements apply to this natural gas flue that being having to extend 2' above a structure which is located within 10' of the flue. Thanks.

    Similar Threads:
    F.I.R.E. Services

  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,248

    Default Re: Gas fireplace flue (chase) clearance above roof

    From Figure G2427.6.4 in the 2006 IRC:
    Roof Slope -|- Minimum Height
    Flat-6/12 -|- 1.0 feet
    6/12-7/12 -|- 1.25 feet
    7/12-8/12 -|- 1.5 feet
    (and gets higher with steeper roof slopes)

    However, the gas vent must be not less that 8 feet from a vertical wall or similar obstruction, or, if less than 8 feet from a vertical wall or similar obstruction, the vent needs to be at least 2 feet higher than the any portion of the building within 10 feet.

    At less than 10 feet, but if greater than 8 feet, your gas vent should be okay.

    - G2427.6.4 (503.6.4) Gas vent termination. A gas vent shall terminate in accordance with one of the following:
    - - 1. Gas vents that are 12 inches (305 mm) or less in size and located not less than 8 feet (2438 mm) from a vertical wall or similar obstruction shall terminate above the roof in accordance with Figure G2427.6.4.
    - - 2. Gas vents that are over 12 inches (305 mm) in size or are located less than 8 feet (2438 mm) from a vertical wall or similar obstruction shall terminate not less than 2 feet (610 mm) above the highest point where they pass through the roof and not less than 2 feet (610 mm) above any portion of a building within 10 feet (3048 mm) horizontally.
    - - 3. As provided for direct-vent systems in Section G2427.2.1.
    - - 4. As provided for appliances with integral vents in Section G2427.2.2.
    - - 5. As provided for mechanical draft systems in Section G2427.3.3

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

Bookmarks

Posting Permissions

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