We just bought a new AC unit for our living room last summer to replace the 1971 FORD unit that came with the house. We also have a unit in our bedroom. But I'm seriously considering putting CAC in our little ranch because DD's room is currently 81 degrees. To be fair, we did just turn the AC on when we got home right before her bedtime at 7. We would only need 6 rooms and 2 bathrooms hooked up. It can't cost THAT much....right?!