Re: Condensation problem in AC ducts
I would appreciate your comments on this problem...
The air handler + ducts are in an unheated attic [I live in WV]. The AC vents are in the ceiling. Condensation accumulates in the
ducts during the winter from air that leaks into the ducts from the ceiling vents. This moist air condenses in the ducts. The attic ducts consist of a rigid duct that travels the length of the attic with 6" flexible ducts connecting the rigid duct to the
ceiling vents. The rigid duct is covered with 2" insulation. The flexible ducts are insulated.
Question: How to stop the moist air from condensing in the ducts?
 Add more insulation to the rigid and flexible ducts? Am I correct that this will slow the condensation process, but not prevent the condensation since the ducts will eventually get cold enough to reach
the dew point?
 Keep the ducts warm by periodically [say about once per week] running the air handler during the winter for about 30 minutes or so?
The problem - large heat loss due to keeping the return vent uncovered [we open the return vent grill, remove the filter, and place 4" insulation on top of the grill.].
 Remove the flexible ducts from the ceiling vents in the fall and reconnect in the spring? I do this now, but this is a real pain and not the preferred solution.
 HELP - Anything else????