I am contemplating adding insulation to my ductwork -- which is in the basement of my 1800 sq ft bungalow. I am talking about insulating the ducts theselves to give them an R-6 or R-4 rating. The ductwork is 80% accessible in an unfinished basement.
If I insulated the ductwork with a product like rfoil (at http://www.tvmi.com/rfoil/), would the cost savings be worth the cost outlay and the effort?
I have already used the metallic-based rfoil tape on the joints of the ducts.