Used for dirty and dusty environments. These portable blower fans have an enclosed 2-speed, 1/4 HP ball bearing direct-drive motor and are permanently lubricated for optimum performance. Industrial fans have corrosion and dent proof high density polyethylene housing and spiral wire guards that enclose 3 aluminum fan blades for user safety. 10L SJT type 3-conductor power cord. 120V. Floor Fans are operated by rotary switch. Yoke Mount Models feature pull chain operation. Can be directly bolted to any surface or used with Optional Wall/Ceiling Mount. Meets OSHA standards. UL approved. 1 Year Limited Warranty.