Condensation In Attic Ductwork In Winter

Think about it condensation on ductwork probably isn t a big problem in phoenix arizona but why.

Condensation in attic ductwork in winter.

No the radiant barrier will not solve the condensation issue. Another condensation problem occurs in cold climates in the winter with ac ducts in the attic and a different heating system. When outside temperatures drop down below about 40 pretty much nov thru march condensation starts forming in the ducts and drips from some of the ceiling registers. Because the average humidity level is 10 20 in phoenix.

Even though the ducts are insulated and my attic is over insulated the air and surfaces inside the ducts will get very cold if the hvac is left off. Over time condensation dripping from your ductwork onto attic insulation can cause it to compress which lowers its r value. But i notcied that the condensation only formed when the outside temps fell below about 20 degrees. But at a premium cost.

The house air with its moisture rises into the ducts cools and condenses the moisture cool air sinks and is replaced with more warm moist air from inside the house. Condensation problem in the ductwork in wintertime question i have a dedicated ductwork system with the air handler in unconditioned attic. However an attic in pensacola florida is likely to have a humidity level closer to 100 and the risk of condensation on ductwork would then go up quite a bit. When the warm air rising from the first floor gets into the duct inlets a lot of condensation forms.