+ Reply to Thread
Results 1 to 9 of 9

Hybrid View

  1. #1
    Join Date
    Aug 2012
    Posts
    3

    Default A/C duct sweating

    We have 2 a/c ceiling vents. One in each bathroom. Each is on an interior wall. There is an insulated un-heated attic above. Occasionally we find condensation on them. It doesn't matter if the bathroom is used or not.
    When the showers are used we always put on the exhaust fan.

    Any ideas how to stop the sweating?

    Thanks.

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,758

    Default Re: A/C duct sweating

    Try insulating them or replace with flex ducts.

  3. #3
    Join Date
    Dec 2007
    Location
    Tennessee
    Posts
    1,791

    Default Re: A/C duct sweating

    What exactly is sweating, the ducts, the vents or both? If its the ducts, are you seeing water on the inside of the duct or the outside? Is it only bathroom vents and ducts or are other rooms affected as well? Do you see sweating on the outside of the ducts in the attic?

    Your attic insulation, is it in the ceiling or have you insulated the rafters and the gable ends? Does the attic have adequate ventilation?

  4. #4
    Join Date
    Aug 2012
    Posts
    3

    Default Re: A/C duct sweating

    We have flex insulated ducts, metal boots. The attic floor is insulated. The condensation is on the vent grilles.
    Thanks

  5. #5
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,758

    Default Re: A/C duct sweating

    Quote Originally Posted by cashm View Post
    We have flex insulated ducts, metal boots. The attic floor is insulated. The condensation is on the vent grilles.
    Thanks
    3 things to check now: your return, the filter and room humidity.

    Question: what temp is your thermostat set on and what's the temp outside?

  6. #6
    Join Date
    Aug 2012
    Posts
    3

    Default Re: A/C duct sweating

    It's 90 outside & Stat is set on 79.
    We even have condensation in a guest bath that has not been used.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •