Wow, great ideas! The mini-split ductless heat pump deals would be awesome, but way out of my price range for a rental
I thought the fan on some of them would be a relative waste of energy. I will probably search for one that actually maintains a certain temperature and controls itself. We dealt with run-away heat with the room heaters before, especially after the furnace kicks on in the morning.
Never even considered that an airconditioner is an efficient heat pump... wow. Will have to think about that one, I have a few extra window units sitting in my basement (the part that didn't get sprayed with poo water)