HEAVY DUTY SQUARE PORTABLE BLOWER FANS 48" Diameter Fan These heavy duty blower fans are designed to provide powerful cooling that's easy to move where you need it. Durable square fan housing is made of 18 gauge galvanized steel with 20 gauge powder coated venturi to promote long lasting, efficient cooling at high velocity. 4 steel fan blades are powered by a powerful 120V, single-phase ball bearing belt drive motor that is permanently lubricated and drip-proof for virtually no maintenance. Fan blades are enclosed within front and rear powder coated wire guards for safety. Tubular steel handle and two 4" casters allow easy portability. 12'L, 3-conductor SJT power cord. UL listed. Meets OSHA standards. 1 Year Limited Warranty. Horsepower rating based upon maximum speed/load.