Heat pump in IL?
We're looking at a house in central Illinois that has an exterior York heat pump/AC combo that is labeled "3 ton G/E" and evidently was installed in 1996. The house is on a crawl without a lot of room. I realize it is an old unit, but is a heat pump adequate in this climate? Winter lows can typically be in the 'teens. We're asking about utility costs. We've always had a basement w/ forced air gas furnace.