Pennsylvania Firearm Owners Association
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  1. #1
    Join Date
    Dec 2006
    Location
    Bucks, Pennsylvania
    Posts
    12,200
    Rep Power
    21474860

    Default Turns out, the AC is not so good for your guns . . .

    I just found a rusty gun on my dresser.

    It's about 2 feet from the window, and the air conditioner shoots cold air directly across where it was laying.

    With the humidity we've had, what I had made was a holstered metal de-humidifier condensing unit. Chilled steel, damp air, do the math.

    Most of the gun is fine (but dewy), but the barrel had sprouted rust. I dissolved the rust off but the finish on the barrel is ruined. Ordered a replacement factory barrel ($175), it's a drop-in so it should be OK.

    Heads-up to the rest of you, be careful about storing your guns in the nicely chilled air, you might as well leave it out in the yard to get rained on.
    Attorney Phil Kline, AKA gunlawyer001@gmail.com
    Ungawa's M16A1 is for sale, see the NFA ads! http://forum.pafoa.org/showthread.ph...06#post3835606

  2. #2
    Join Date
    Dec 2010
    Location
    Erie, Pennsylvania
    (Erie County)
    Posts
    5,962
    Rep Power
    21474849

    Default Re: Turns out, the AC is not so good for your guns . . .

    Forget the Math, let's talk Physics; https://www.buildinggreen.com/news-a...r-conditioners
    Quote Originally Posted by cdi View Post
    A drop leg holster? A big clue indicating an Operator operating operationally, of course.

  3. #3
    Join Date
    May 2012
    Location
    Pittsburgh-South Hills, Pennsylvania
    (Allegheny County)
    Posts
    78
    Rep Power
    2081652

    Default Re: Turns out, the AC is not so good for your guns . . .

    If your AC unit is too big it will do this, but you really need to know the humidity level in your house to tell.

    If an AC is oversized, it will satisfy the call for cool too quickly and it won't cycle the air in the house enough to dehumidify. If this is happening, you'll also likely have condensation at your air registers and potential mold issues in your ducts.

    All a room dehumidifier is is an AC unit that doesn't dump hot air outside, and never has a temperature call to satisfy - so it just keeps running.

  4. #4
    Join Date
    Apr 2008
    Location
    New Oxford, Pennsylvania
    (Adams County)
    Posts
    131
    Rep Power
    2862175

    Default Re: Turns out, the AC is not so good for your guns . . .

    The gun was in the direct path of the cold discharge air. With the A/C on, the metal temp was lowered 15-20 deg. When the unit cycled off, and the warmer "average" air temp, the gun was below the dew point and condensate formed. If it had been located farther away out of the direct path of the cold air, there would have been less, or no condensate on the gun.

  5. #5
    Join Date
    Sep 2009
    Location
    POCONO MOUNTAINS, PENNSYLVANIA, Pennsylvania
    (Monroe County)
    Age
    67
    Posts
    2,530
    Rep Power
    21210384

    Default Re: Turns out, the AC is not so good for your guns . . .

    Quote Originally Posted by GunLawyer001 View Post
    I just found a rusty gun on my dresser.

    It's about 2 feet from the window, and the air conditioner shoots cold air directly across where it was laying.

    With the humidity we've had, what I had made was a holstered metal de-humidifier condensing unit. Chilled steel, damp air, do the math.

    Most of the gun is fine (but dewy), but the barrel had sprouted rust. I dissolved the rust off but the finish on the barrel is ruined. Ordered a replacement factory barrel ($175), it's a drop-in so it should be OK.

    Heads-up to the rest of you, be careful about storing your guns in the nicely chilled air, you might as well leave it out in the yard to get rained on.
    Glocks Dont Rust !

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