Fiberglass Duct Insulation Types There are four basic types of HVAC fiberglass insulation products: duct liner, duct wrap, duct board, and flexible ducts. Here is a review of the composition of each: ...

In many high-end new-build projects, ductwork is routinely insulated to help minimize energy loss as conditioned air travels from the HVAC units through the ductwork. But duct insulation is being used ...

Q: How should I insulate the heating and cooling ducts that run through the attic of my 1950s bungalow in East York? The ducts run across the tops of ceiling ...