The 30" belt drive whole house fan (5700 CFM) with automatic shutter helps cool living spaces up to 1900 square feet. It runs on high & low and a 2 speed wall switch is included. The automatic shutter is white. It needs 1095 square inches of open exhaust vents in attic space, with a rough opening of 34-1/4" x 29". You do have to cut joist when installing fan, with the motor mounted on struts above housing. The fan will be quieter than direct drive models. There is a 10 year limited parts warranty, 5 year limited labor warranty.
- Belt-drive pulley allows quieter operation
- UL listed with thermal overload protection
- Shipped in an assembled wood frame
