Heavy Duty Belt Drive Exhaust Fan-Less, Belt Drive Less Motor Package (Motor Not Included), CFM Range: 48,356-69,692, Max Ambient Temp: 104F, Motor HP Range: 5-15, RPM Range: 485-699, Mounting Position: Horizontal or Vertical, Frame Material: Galvanized Steel, Propeller Material: Cast Aluminum, Number of Blades: 6, Propeller Dia: 60", Max Depth Including Shaft: 34", Venturi Clearance Dia: 61", Venturi Depth: 7-9/16", Bearings and Shaft Size: 1-3/4", Dims: 66"H x 66"W x 29"D, Weight: 515 Lbs, Bulk, Made in USA, Requires Wall Collar and Shutter for New Installation,