Smokebuster® in-ceiling air filtration units are designed to remove smoke, dust, pollen, and other airborne irritants and simultaneously replace spaces with fresh, clean air, says the manufacturer. Built to fit the space of a standard 2- by 2-ft ceiling tile, the units can be used in offices, restaurants, cocktail lounges, medical and dental offices, and other commercial applications. Available in 500- and 1,000-cfm capacities, the models feature three-speed fans with an optional electronic speed control. They use 120-vac, 60-Hz single-phase power.

Aercology, a Donaldson Co., 8 Custom Drive, Old Saybrook, CT 06475-4009; 860-399-7941; 860-399-7049 (fax); (e-mail); (website).