Question by  catlover76 (33)

What causes condensation on top of duct work?

My duct work is sweating.


Answer by  dsmith42 (371)

The air in the duct is cold while the air in the room outside the duct is warmer and moist. When warm moist air gets cold on the surface of the duct, the water vapor condenses out of the air to make water.


Answer by  Latin4 (11170)

There is probably to much moisture in the basement and you need to get a dehumidifier and run it to take the moisture out.


Answer by  G30 (36)

Moisture in warm air contacts the cool surface causing the the water in the air to condense on top of the duct work.

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