I have an old home in which ductwork has been retrofitted. The ducts for the first floor are arranged under the floor. The first floor is heated and cooled by an electric package unit sitting just outside the house.
I want to replace the unit with something more efficient, and split systems have the advantage in efficiency and price. However, there's nowhere inside the house on the first floor where the furnace half of the system could be installed.
Would it be insane to build an outdoor enclosure to house the furnace unit so that it would basically occupy the same real estate as the current package unit?
Best Answer
Since efficiency is your concern, why don't you install a geothermal system? There are geothermal split systems (example) that are designed to use very little space indoors.