Whole House Fan, Belt Drive, 2 Speed, Propeller Dia 42 In, CFM High 12000, CFM Low 7900, HP 1/2, Fan RPM 410/270, Voltage 115, 60 Hz, Single Phase, Amps 8.2/4.4, Height 15 In, Width 46 In, Depth 46 In, Ceiling Mounting Location, Requires Ceiling Shutter, Includes 1 x 6 Inches Wooden Plenum and 3/4 x 7/16 Inch Adhesive-backed Sponge Rubber Mounting Strip, Two-speed Switch and 12-hour Timer

Whole House Fan, Belt Drive, 2 Speed, Propeller Dia 30 In, CFM High 5900, CFM Low 3900, HP 1/3, Fan RPM 455/305, Voltage 115, 60 Hz, Single Phase, Amps 6.7/4.7, Height 15 In, Width 34 In, Depth 34 In, Ceiling Mounting Location, Requires Ceiling Shutter, Includes 1x4 Wooden Plenum Box, Rubber Mounting Gasket, Two-speed switch and 12-hour timer