The company's heavy-duty air circulators come standard with highly polished cast aluminum airfoil propellers. Due to their highly polished surface, the propellers provide high efficiency and low noise levels. They have an ideal air velocity profile for circulating and cooling, states the manufacturer. Available motors include three-speed, 1/3-hp, 115-volt, either oscillating or nonoscillating; and single-speed, three-phase, 1/4-hp explosion-proof motors. A selection of mounting accessories is available.

AirMaster Fan Co., 1300 Falahee Rd., Jackson, MI 49203; 517-764-2300; 517-764-3838 (fax);

eProduct #190