[olddog]

I second Tommy.

You definitely want to know if it is a heat pump or not. Heat pumps both heat and cool. They are typically physically larger than an air conditioner for a similar sized house.

Here in Ohio it is very common on new installations to put a heat pump in and use it with a gas furnace. You get the best economy that way. If it is mildly cool outside the heat pump is more efficient. Under those conditions the heat pump will run and the burner in the gas furnace will not light.