Lately I have seen many properties with RENTED furnaces, the hot water tank is a norm around here, but not the the furnace. Buyers normally dislike the rented furnace because it means that they are not getting what most other properties have included. I have heard that the contracts of very expensive and difficult to get out of. So think twice before renting a Furnace for you property, it might cost you much more than what you thought when selling.