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Very very powerful Jul 10, 2010
By Brian Cashman This direct drive whole house fan took the place of a belt drive and the new fan is very, very powerful. When there are those middle temp days when it is nice out, but the air in the house is still and warm, we pop this on and leave the A/C units off. It makes all the difference. In this instance, you have one motor going, and not drawing anything like an A/C compressor, and the whole house is cool. Great deal more efficient.