INVISCO offers you the highest performance rafter mounted whole house fan you can find. Our ES6320 pulls 6,320 CFM in a 20 inch throat – more than any other 20 inch on the market. And it is at an excellent price – lower in cost per CFM than any other.
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Below is the mounting bracket that hangs from the easy-to-install cross bar attached to two rafters. Air is blown to the left and pulled up from your ceiling through the insulated flexible duct on the right.