According to the manufacturer, Multi-Wing H Series fans feature an airfoil profile blade that achieves greater performance and lower noise level than conventional, one-piece, injection-molded fans or metal-stamped fans. The materials of the H Series fans include injection-molded engineered thermoplastic or cast aluminum blades and pressure die cast aluminum hubs. These fans are available in 7- to 29-in. dia, in configurations from two to 14 blades with pitch angles from 25 to 45 degrees, says the company.

Crowley Co., P.O. Box 425, 15030 Berkshire Industrial Parkway, Burton, OH 44021; 800-311-8465 or 440-834-9400; 440-834-0449 (fax); (e-mail); (website).

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