Standard Square Axial Fan Fan Shape Square Mounting Eye O.C. 2 13/16 in Height 3 1/8 in Depth 1 in Width 3 1/8 in CFM @ 0.000-In. SP 41/40 Watts 3.6/3.6 Voltage 115V AC 60/50 Hz 0.21/0.22 Amps Electrical Connection - Fans Lead Wires Sound Level 33/32 IP Rating IP20 Mounting Position Vertical or Horizontal Bearing Type Zero Friction Air 3300/3200 RPM Motor Design Shaded Pole Motor Insulation Class A Thermal Protection Impedance Max Ambient Temp 158 Degrees F