Air Vent 54301 Direct Drive Whole House Fan

Features.Direct drive whole house fan with automatic shutter.Pulls air from a house size of 1500 sq. Ft.4500 cfm, 110v,runs on high & low.2 speed pull chain included.Needs 864 sq. In. Of open exhaust vents in attic space.Rough opening is 27.75 x 29 in. Automatic shutter is white.Do not have to cut joist when installing fan for easier installation.Size - 24 in. Dimension - 31.25 x 10.5 x 30.75 in.Item weight - 37 lbs.