Standard Square Axial Fan, Fan Shape Square, Mounting Eye O.C. 4 1/8 in, Height 4 11/16 in, Depth 1 1/2 in, Width 4 11/16 in, CFM @ 0.000-In. SP 115 cfm, Watts 20 W, Voltage 115V AC, 60/50 Hz Hz, 0.25/0.28 A Amps, Electrical Connection - Fans Terminals, Sound Level 49/44, IP Rating IP20, Mounting Position Horizontal, Bearing Type Sleeve, 3100/2700 RPM RPM, Motor Design Shaded Pole, Motor Insulation Class A, Thermal Protection Impedance, Max. Ambient Temp. 158 Degrees F