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  1. #1
    Join Date
    Dec 2011
    Location
    Sea Islands, SC
    Posts
    2

    Carrier / Heil Air Handlers Sweating

    Hey has anyone had any problems with new Carrier / Heil airhandler sweating? Got a new install Carrier 5 Ton that wont stop sweating. Ductwork is properly sized with proper static pressure, have tried relining unit with double insulation and all... Any Ideas? Also noticing gaps between slant coils and the cabinet on new equipment allowing unconditioned air around, have tried factory weather stripping kit but not nearly thick enough.

    Didn't know if anyone else has been seeing this?

  2. #2
    Join Date
    May 2009
    Location
    Savannah, Ga/H.H. Island, S.C.
    Posts
    1,528
    Where is the AHU located? Start examining the surroundings. Botched spray foam jobs seem to be the #1 cause around here. But we have a lot of attic installations. The insulation inside the cabinets is a very low rated R-value.

  3. #3
    Join Date
    Jul 2008
    Location
    Rochester NY
    Posts
    4,739
    Quote Originally Posted by Brent Ridley View Post
    Where is the AHU located? Start examining the surroundings. Botched spray foam jobs seem to be the #1 cause around here. But we have a lot of attic installations. The insulation inside the cabinets is a very low rated R-value.
    +1
    BPI classes taught search out the source before attempting "fixes".

    Find the source and you may cure the disease, and be able to abandon perpetually treating symptoms.

    Find the moisture source. Where is humid air coming from?
    Which makes more sense to you?
    CONSERVATION - turning your thermostat back and being uncomfortable. Maybe saving 5-10%
    ENERGY EFFICIENCY - leaving your thermostat where everyone is comfortable. Saving 30-70%

    DO THE NUMBERS! Step on a HOMESCALE.
    What is comfort? Well, it AIN'T just TEMPERATURE!

    Energy Obese? An audit is the next step - go to BPI.org, or RESNET, and find an auditor near you.

  4. #4
    Join Date
    Jul 2010
    Location
    Eastern Kentucky
    Posts
    55
    If air handler is underneath the house, make sure the vents to the crawl space around home are closed off. The air handler is below the outside air dew point temperature.

  5. #5
    Join Date
    Dec 2000
    Location
    Flat Rock, NC
    Posts
    463
    I have wrapped the air handler with ductwrap before on some wet crawlspace applications, it sounds bad but it works. also seal all seams and doors w/ silicone thin bead, its easier to get the door off than taping.

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