Okay, so she wants this for those rare occasions when heat/humidity get so bad we need an AC. We have awning windows, so window unti not an option. I would like a unit to heat also, in winter I run wood stoves in the main living areas, LR/KIT, family room, DR all open floor plan, the furnace for these zones barely ever comes on. At night we close the one door separating the "common area" from the bedrooms/bathrooms. Overnight in this area is where we use most of the oil. Do MS's do a good job of cooling and heating? Would electric be preferable to gas?