JPhil
Huh?
They say they are not as efficient. My bill was HIGHER with the "temp" window units.
You're right. Window mount AC units are about as thermally (RE: economically) efficient as fireplaces. If you want to do individual 'zoned' cooling, you need a mini-split AC system---like a whole house AC, but only for each area. You can use one outside condenser for several individual room units as well. Plus they make them as heat pumps, so you can use them for heat too in temperate climates. They are not uncommon in those goddam socialist countries over in U-rope where electricity costs a lot.....
(To learn more visit my website at 'wwwJohn.Dulley.kom', Visa & MasterCard accepted.....)