I have a two story home with 2000 square feet of living space. 1100 down stairs, and 900 up stairs. The house has forced air/natural gas heat. I'm going to replace some of the old heating duct. Should I replace them with the galvinized tin ones, or the plastic coiled/insulated ones? Does it help to insulate the tin type? I have a basement, but the house has two additions with crawl spaces.
Also has anyone used a secondary inline fan to help push heat though the house? Home Depot has them, ans says it helps save money on heating bills.
Thanks,
Steve