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Thread: duct board

  1. #1
    Join Date
    Dec 2004
    Posts
    91
    can yo do anything to treat ductboard for mold once installed?

  2. #2
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    655
    Yes and No and mostly no.

    IF, a very big IF, you can clean the duct. (rotarary brush will damage the board as will and air whip) but a straight air nozzle with no whip will also remove MOST of the dreaded mold. Then it can be coated with any one of sevearal sealers and fungacides (like Fosters').


  3. #3
    Join Date
    May 2004
    Posts
    368
    Hmmmmmmmmmmm, thought Fosters was Austrailian for Beer not sealer and fungicides. Them Aussies think of everything lol
    Vern P: 2003 MBC,MRC,IFGC,IFC
    An HVAC-Talk Michigan Chapter Mechanical Inspector, Jurisdiction-Ann Arbor

  4. #4
    Join Date
    Feb 2004
    Location
    chicago suburbs
    Posts
    4,422
    yes..yes you can treat it. remove it V-E-R-Y carefully and take it to the curb where smash the living crap out of it and replace with some fancy cleanable metal.
























    sorry.......couldn't resist. i'm weak.
    FILL OUT YOUR PROFILE!!

  5. #5
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    655
    tinner,

    Don't forget to tell them to insulate with wrap, not liner, or you get the same problem when you do try to clean it.

  6. #6
    Join Date
    Feb 2004
    Location
    chicago suburbs
    Posts
    4,422
    listen to bldgcode1....he speaks the truth.
    FILL OUT YOUR PROFILE!!

  7. #7
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    655
    many thanks, and may the admiration of the fleas of a 1000 camels turn their attention to your most hostile associate.

  8. #8
    Join Date
    Jun 2004
    Location
    Maryland's Eastern Shore
    Posts
    892
    mmmmm, thats one heck of a curse you have there...

  9. #9
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,535
    Your a/c either has wet cold air blowing through it or saturated wet from the wet a/c cool throughout the summer. This ideal for mold growth. To prevent mold growth in your a/c ducts, fiberglass or metal, dry thoroughly a couple hours every day. This requires <50%RH air inside your home. Operating your fan for two hour each day when the a/c is not operating is one way. Another method is to discharge the output from a whole house dehumidifier into the a/c supply duct. The units blow 200-300 cfm of dry air. Warm dry air will dry the a/c ducts dry enough during the "off cycle time" to avoid mold growth.

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