Standard Square Axial Fan, Fan Shape Square, Mounting Eye O.C. 9 7/16 in, Height 8 7/8 in, Depth 3 1/8 in, Width 8 7/8 in, CFM @ 0.000-In. SP 642 cfm, Watts 55 W, Voltage 24V DC, 2.6 A Amps, Electrical Connection - Fans Terminals, Sound Level 60, IP Rating IP42, Mounting Position Vertical or Horizontal, Bearing Type Ball, 2950 RPM RPM, Motor Insulation Class B, Max. Ambient Temp. 140 Degrees F, Blade Material Sheet Steel, Housing Material Cast Aluminum