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  1. #1
    Join Date
    Aug 2007
    Location
    Dallas, TX
    Posts
    43

    Mold on inside of supply vents

    All-

    Sealing up the last of my supply vents (mastic between the drywall and the sheetmetal boot). Vents and boots are 30 years old (with the house), all-new AC/furnace/air handler and flex duct to the boots 4 years ago. All equipment and duct work in (recently more) ventilated attic.

    A few of the grills were somewhat dirty, and a few had a few spots of mold (that were cleaned and bleached). This last vent had a good bit of mold on it, some of it fuzzy, covering 30-40% of the inside-facing surfaces. Wish I took a picture before I cleaned it off Well, no I don't This particular vent is directly below the (both old and new) air handler assembly.

    Short of a professional inspection (and porbably ripping out some ceiling, which I'd like ot avoid), any reason for concern here? The old system that was replaced was in poor condition, and was replaced within a year of moving into the house. I'm imagining some condensation/moisture worked it's way down.

    Thanks!

  2. #2
    Join Date
    Jun 2004
    Location
    4H: Hot, Humid Houston H.O.
    Posts
    3,304
    Quote Originally Posted by texasmax View Post
    All-

    Sealing up the last of my supply vents (mastic between the drywall and the sheetmetal boot). Vents and boots are 30 years old (with the house), all-new AC/furnace/air handler and flex duct to the boots 4 years ago. All equipment and duct work in (recently more) ventilated attic.

    A few of the grills were somewhat dirty, and a few had a few spots of mold (that were cleaned and bleached). This last vent had a good bit of mold on it, some of it fuzzy, covering 30-40% of the inside-facing surfaces. Wish I took a picture before I cleaned it off Well, no I don't This particular vent is directly below the (both old and new) air handler assembly.

    Short of a professional inspection (and porbably ripping out some ceiling, which I'd like ot avoid), any reason for concern here? The old system that was replaced was in poor condition, and was replaced within a year of moving into the house. I'm imagining some condensation/moisture worked it's way down.

    Thanks!
    As a homeowner in S.Texas, I am not qualified to give expert advice but can point out that many times mold growth is no more than a nuisance. Many times nobody in the house is particularly allergic to it, and the stuff is easily killed and cleaned off. My own house had some mold on supply grilles one time, which was discovered during a professional project of sealing the boots to the sheetrock. It was blamed on air leakage between the hot-humid attic and the much cooler supply grille, and has not recurred since the sealing.

    Best of luck -- Pstu

  3. #3
    Join Date
    Aug 2007
    Location
    Dallas, TX
    Posts
    43
    Good to know- thanks!

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