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I’m starting to rebuild our forced hot air system after getting the house on a new foundation. All ductwork is now well insulated. However, before having a new plenum made up, I am pondering either replacing the propane furnace or just keeping it for backup and switching to a heat pump for...

We have an 80 yr. old, 2 story farmhouse on a pier and post foundation and have been trying to get it on a fully sealed perimeter wall system. We've contacted local (rural) contractors and there seems to be two approaches. One is to lift the house many feet in the air so that they can work...