24" direct drive whole house fan with automatic shutter (4500 cfm) pulls air from a house size of 1500 square feet. 110v runs on high & low, with a 2 speed pull chain included. You do not have to cut joist when installing fan for easier installation. It needs 864 square inches of open exhaust vents in attic space. The automatic shutter is white and the rough opening is 27-3/4" x 29". There is a 10 year limited parts warranty and a 5 year limited labor warranty.
- Pull-chain operation
- UL listed with thermal overload protection
- Shipped in an assembled wood frame
