Standard Round Axial Fan, Fan Shape Round, Mounting Eye O.C. 9 11/16 in, Diameter 10 in, Depth 3 1/2 in, Fan Cord Length 27 in, CFM @ 0.000-In. SP 537 cfm, Watts 38/40 W, Voltage 230V AC, 50/60 Hz Hz, 0.18/0.19 A Amps, Electrical Connection - Fans Lead Wires, Sound Level 51/54, IP Rating IP33, Air Flow 454/537 cfm, Mounting Position Vertical or Horizontal, Bearing Type Ball, 1400/1700 RPM RPM, Motor Design Permanent Split Capacitor, Motor Insulation Class A, Max. Ambient Temp. 176 Degrees F