Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 4 1/8 in Height 4 3/4 in Depth 1 1/2 in Width 4 3/4 in CFM @ 0.000-In. SP 22/20 Watts 18/20 Voltage 230V AC 60/50 Hz 0.11/0.14 Amps Electrical Connection - Fans Terminals Sound Level 50/48 IP Rating IP20 Mounting Position Horizontal Bearing Type Sleeve 2900/2600 RPM Motor Design Shaded Pole Motor Insulation Class A Thermal Protection Impedance Max Ambient Temp 158 Degrees F Blade Material Polybutylene