Axial Fan, Square, 41 CFM @ 0.000-In SP, Voltage 115 AC, 60/50 Hz, Single Phase, Amps 0.116, Watts 3.6, Fan RPM 3300, 33 dBA, Height 3 1/8 In, Width 3 1/8 In, Depth 1 In, Mounting Holes O C 2 13/16 In, Vertical or Horizontal Mounting Position, Motor Insulation Class B, Impedence Thermal Protection, Max Ambient Temp 158 F, Zero Friction Air Bearings