GREEN BREEZE HAF FANS 20" Diameter Fan Features an easy open hinged front wire guard for easy maintenance. Motor allows variable speed operation when used with a variable speed control (not included). Single-phase direct drive motor provides up to 1725 RPM. Totally enclosed motor has sealed ball bearings and automatic thermal overload protection. 3 aluminum fan blades. Includes an adjustable mounting bracket that's attached to motor yoke to help reduce vibration. Powder coat finished fan guard and hot dipped galvanized bracket for corrosion resistance. Features 6'L, 115V/230V power cord. Motor is UL/ULC (Canada) recognized. 2 Year Limited Warranty. Horsepower rating based upon maximum speed/load.