Lose of Heat Through Duct Work

Discussion in 'HVAC Heating & Cooling' started by River Rat, Dec 18, 2007.

  1. River Rat

    River Rat New Member

    Aug 13, 2007
    How can one stop the lose of heat through your heat ducts?

    I would like to make my Heat Ducts more effect but would like to know how one can do it?
  2. leejosepho

    leejosepho DIY scratch-pad engineer

    Nov 23, 2006
    disabled-retired industrial fabricator
    200 miles south of Little Rock
    I have one duct running through unheated space, and I have wrapped that line with insulation. I have not insulated any of the others because any heat that radiates from them goes into heated space anyway. If you might have a cool/cold room at the end of the line, be sure its return is not in any way obstructed and/or possibly damper other rooms a little to force more warm air out to the end.
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    The biggest problem with ducts is leaks. Do NOT use fabric duct tape; it will dry out and leak, plus leave a residue. They make a metal self-stick tape that works quite well for this. It has a paper release on the back so it unrolls off the roll well.

    The ducts can be insulated with wrap or solid insulation.
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