A highly polished cast aluminum propeller features high efficiency, a self-cleaning design and ideal air velocity for circulating and cooling, according to the company. Available motors include three-speed, 115-volt oscillating, nonoscillating and explosion-proof motors in one and three phases. A selection of mounting accessories is also available.

Airmaster Fan Co., 1300 Falahee Road, Jackson, MI 49203; (517) 764-2300; fax: (517) 764-3838; www.airmasterfan.com.