A friend of mine created this lovely word, and I love it.
The house we "bought" had duel furnace and a/c's. One set heats/cools the "old" portion of the house while the other set the "new" portion. The "old" set really need to be replaced as they're the original furnace and a/c. Of course the furnace doesn't work so it definitely needs to be replaced.
So we're looking into getting a heat pump. Our electric company has an initiative that they will help you finance a heat pump and pay for it via your electric bill as well as give you savings on your electricity costs. Unfortunately neither K nor I know anything about heat pumps.
I'm also secretly hoping that one heat pump can replace ALL of the units.