Main causes for condensation occurring in your AC ducts include the temperature difference between the outside air and AC vent, improperly sealed AC ducts, and lack of insulation around these ducts. However, ductwork sweating can also be aggravated by factors like: Too much air moisture. Dirty air filters.

Is it normal for AC lines to sweat?

Central Air Conditioning Pipes Sweating or Leaking? Moist, humid air will get inside the pipe insulation, even a pinhole leak, and cause the pipe to sweat. That can lead to water damage because the moisture it creates will accumulate. It may appear that the copper pipe is leaking water.

How do I stop condensation on my AC lines?

Wrapping your AC ductwork is an effective way to prevent condensation. Duct wrap has a foam insulation inner layer and a foil outer layer. Cleanly wrap it around the AC duct and fasten with duct tape near the joints.