Kenmore 12,000 BTU Multi-Room Air Conditioner —
We bought this in June when the weather was very warm. Never turned it off since.
Runs quite and have'nt notice much of a change on the power bill.
It cools 4 rooms easly. I closed of 2 back rooms that we hardly use. But I think it could cool them too.
If your looking for something to cool your 1 story house with this will work. Buy it.