Thanks for the info, I will try that.
Live in VA, no return air can make it warm here in the summers = cranking the heat pump to cool off the house=condensation on supply air duct, a bad cycle.
Thanks again
Wondering if anyone can help, I have condensation on the supply air ducts in the space between the 2nd and 3rd floor of a townhouse. There is no return air on our heat pump unit, the heat pump is new (1 year old) and the condensation has rotted two layers of ceiling drywall. Should I used...