We just finished installing a quiet cool Stealth 3.3 whole house fan for a happy a customer in San Jacinto, Ca. This house has a traditional attic space that gets super hot in the summer. The client said that no matter how much they ran their AC during the summer they could never cool down the house. Now they have an incredibly efficient natural way to cool their home with the flick of a switch! The Stealth 3.3 only uses an amazing 74 watts while moving 1980 cubic feet a minute of cool air! On high it only uses 264 watts and moves 3159 CFM.