Air Vent 54301 Direct-Drive Whole-House Fan with Automatic Shutter, 24″

Whole-house fans are installed in a central hallway inside the house and pull fresh outdoor air through open windows. They are often used to augment air conditioning or instead of air conditioning in mild summertime climates. 4500 CFM 110 Volt Feature two-speed operation, with a convenient pull-chain switch A heavy steel housing with a powder-coated finish makes them extremely durable Can be mounted without cutting an attic joist Assembled wood frame to simplify installation Direct drive whole house fan with automatic shutter Pulls air from a house size of 1500 Sqft Runs on high & low Needs 864 Sqin of open exhaust vents in attic space Rough opening is 27-3/4″ x 29″ Automatic shutter is white Do not have to cut joist when installing fan for easier installation Dimensions: 27-5/8″ x 27-5/8″ x 8-3/4″ Size: 24″.