So you need to install new insulation.
Insulate outside of air handler.
However air handler sweating is different.
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.
Also attic ducts often leak.
This insulation is supposed to prevent the air handler from sweating and condensing moisture on its exterior during warm weather.
Unfortunately you won t find the right insulation at any home center.
Moreover the excess moisture can lead to a damaged plenum mold or termites.
The air handler and supply ducts are all in the attic and so are outside of the insulating envelope of the house.
Condensation on the outside of your air handler can be an effect of an underlying issue.
But i do run it for about 9 months of the year to heat the house.
Here are the most common reasons for air handlers sweating so you can stop the condensation.
Keeping your air handler in a hot florida attic is like throwing money out the window.
The insulation inside the air handler should also be enough to prevent major heat loss in winter months.
Fiberglass insulation inside the cabinet.
I rarely run the unit in the summer time to cool the house.