I recently purchased a 5 year old home and I am on a mission to try and make it as energy efficient as possible w/o breaking the bank. My furnace is in the basement and therefore all heating ducts run across the ceiling of the basement and are uninsulated.
Would it be worth my time and expense to insulate these ducts? Since heat rises, even if they aren't insulated, I'd assume they're heating the basement slightly which would eventually help heat the house, no? Would insulating the ducts help reduce the noise of the heating system? It's somewhat noisy, although tolerable. My basement isn't finished, at least not yet. I live in Wisconsin and it's about 2 degrees outside, but the basement seems comfortable (although it's a bit on the cool side.)
There seems to be a lot of ducts, both square and round, so if I took on this project, it would take a considerable amount of time and money to complete. I don't want to go through all that work if there isn't any real gain when I'm done! :o Any advice you can give would be appreciated.