My coworker has a house in carol county. It is a prefab and was built in 1993. It is 1820 sq. feet and has the upstair and basement finished. It is a cape cod. There is and air handler for the ac in the attic and heating is by electric baseboard units. There is no natural gas in the area. What are the best options to get rid of the electric heaters? Propane, oil? It does have ducting, but he said there isn't enough room in the attic to add a furnace to the air handler.