A 1 /12-hp top-mounted, backward-inclined fan handles 2,500 cfm.

The direct-drive fan with discharge damper is maintenance-free unlike systems incorporating drive belts and bearings. Explosion-relief vents are included. A magnehelic gauge measures filter resistance. Target markets include manufacturers of dyes and pigments, pharmaceuticals, pet food, as well as steel grinding, spice blending, and welding smoke.

Sternvent Co. Inc., 253 West Fort Lee Rd., Bogota, NJ 07603, (201) 488-1146, www.sternvent.com