Three speed, 2950 CFM, 2500 CFM, 2000 CFM; 1085 RPM, 965 RPM, 820 RPM. Rubber feet for non-slip positioning. UL/CUL approved. Top-mounted quick change 3-speed switch accommodates any condition. Plastic rotary fan for durability and long life. Polyethylene housing with lifetime warranty, tough and durable. Metal safety guard, discharge.