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 117/97 Watts 20/22 Voltage 115V AC 60/50 Hz 0.24/0.26 Amps Electrical Connection - Fans Terminals Sound Level 50/45 IP Rating IP20 Mounting Position Vertical or Horizontal Bearing Type Ball 3150/2850 RPM Motor Design Shaded Pole Motor Insulation Class A Thermal Protection Impedance Max Ambient Temp 158 Degrees F