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  1. #1
    Join Date
    Feb 2012
    Location
    Pahrump, NV.
    Posts
    8

    Default Flexible insulated ducting info.

    I'm looking for specific information on flexible insulated ducting. Found a house with silver ducting installed in crawlspace. Ducting is in direct contact with ground, and in a few areas does not have clearance to be raised off ground. I know this isn't acceptable, however would like more specific info. indicating installation and acceptable materials. Thanks!

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  2. #2
    Join Date
    Dec 2007
    Location
    Osceola, AR
    Posts
    310

    Default Re: Flexible insulated ducting info.

    Quote Originally Posted by Scott West View Post
    I'm looking for specific information on flexible insulated ducting. Found a house with silver ducting installed in crawlspace. Ducting is in direct contact with ground, and in a few areas does not have clearance to be raised off ground. I know this isn't acceptable, however would like more specific info. indicating installation and acceptable materials. Thanks!
    2009 IRC is all I have available to me at this moment. This help any?

    MI601.4.6 Factory-made air ducts. Factory-made air
    ducts shall not be installed in or on the ground, in tile or
    metal pipe, or within masonry or concrete.

    M 1601.4.7 Duct separation. Ducts shall be installed with
    at least 4 inches (102 mm) separation from earth except
    where they meet the requirements of Section M1601.1.2.

    Alton Darty
    ATN Services, LLC
    www.arinspections.com

  3. #3
    Join Date
    Mar 2011
    Location
    Sparks,NV
    Posts
    109

    Default Re: Flexible insulated ducting info.

    Scott, I'm not sure what you mean by insulation and acceptable materials. I agree with the ducts should be at least 4" off the ground. This prevents moisture damage and helps keep it from being a highway for pests. Also properly supported ducts will perform better by allowing a smoother pipe for the air to flow reducing static loss. In your area you probably see what I see here which is manufactured homes where the large supply to the other side is laying on the dirt.

    Nevada IOS#1730
    Nevada Energy Auditor #30
    775-342-4767 www.homecsi.com

  4. #4
    Join Date
    Mar 2007
    Location
    Near Philly, Pa.
    Posts
    1,643

    Cool Re: Flexible insulated ducting info.

    National Insulation Association

    Insulate Today. Save Tomorrow. : NAIMA North American Insulation Manufacturers Association

    You can probably find some good info. from these two resources that may not be code but industry stds.

    HTH

    Keep the fire in the fireplace.

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