Here are the most common reasons for air handlers sweating so you can stop the condensation.
Insulate outside of air handler.
Moreover the excess moisture can lead to a damaged plenum mold or termites.
Then measure the outside diameter on the larger of the two tubes the skinny tube doesn t need insulation.
Most come with 1 2 in.
However air handler sweating is different.
Also attic ducts often leak.
Hvac industry insiders follow the protocol of placing air handlers and ductwork whenever possible in cooler locations because this lets the air handler actually cool itself down which lowers its operating costs.
This insulation is supposed to prevent the air handler from sweating and condensing moisture on its exterior during warm weather.
Condensation on the outside of your air handler can be an effect of an underlying issue.
I rarely run the unit in the summer time to cool the house.
Fiberglass insulation inside the cabinet.
The air handler and supply ducts are all in the attic and so are outside of the insulating envelope of the house.
But i do run it for about 9 months of the year to heat the house.
The insulation inside the air handler should also be enough to prevent major heat loss in winter months.
Unfortunately you won t find the right insulation at any home center.