Standard Skeleton Axial Fan Fan Shape Skeleton Mounting Eye O.C. 4 1/8 in Height 4 7/16 in Depth 1 1/2 in Width 4 7/16 in CFM @ 0.000-In. SP 105/80 Watts 18/20 Voltage 115V AC 60/50 Hz 0.18/0.21 Amps Electrical Connection - Fans Lead Wires Sound Level 47/41 IP Rating IP20 Mounting Position Vertical or Horizontal Bearing Type Ball 2900/2550 RPM Motor Design Shaded Pole Motor Insulation Class A Thermal Protection Impedance Max Ambient Temp 158 Degrees F