I'd replace it with the same thing. Heat pumps are getting to be the "thing". Makes cooler weather camping cheaper by saving on the propane. When slides were new, there wasn't much thought about future resale value, now, not having a slide seriously affects resale. As more people become aware of the advantage of heat pumps (and the salesmen are doing their best along those lines), resale of a unit w/o heat pumps will be harder.