I'm beginning to seriously consider this as a solution to the summer heat in both my house and my guest apartment. House has electric forced air furnace, which is very effective at heating, but no A/C. I could have A/C retroed into the existing system, but I think it would be very expensive, and I don't want to cool the whole house...just my bedroom. The apartment is in-wall electric heaters, and again, no A/C. Both spaces have a lot of westward-facing glass, much of it up high with no window covering at all. There are days in the summers here when both those spaces get really uncomfortably warm. The heat load on the room (it's a one-room apartment) is horrendous when the sun gets down to where it's beating directly in through those high windows. My bedroom in the house is similar. Gonna start, I think, by looking into the Mitsubishis...open to all suggestions. Thanks, Rick