@bitprophet Apparently per-room cooling is a common thing in Japan (or maybe broadly in Asia). You do sort of need ways to close off space for maximum effect; open plan space and open staircases could be problems.
Maybe those old house/apartment layouts with lots of walls and doors had some sense to them after all. Close the kitchen door, keep the heat in there...
@bitprophet they really are great. Plus Mitsubishi makes a ducted air handler that uses their same compressor so you can get most of the benefits of their fancy technology without having to put a wall/ceiling unit in every room by keeping some on the ductwork. (Our first floor is using ducts that already existed. Upstairs is using wall units.)
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