Ozone safely alters the molecular structure of offensive micro-organisms to eliminate odor. The Uvonair? CD-800 ozone generator will treat all odors being exhausted by an 8 in (20cm) ventilation system under most circumstances. Intended for rooms up to 20,000 cu ft (600 m?). Installs into other size ducts with adapters. Set the adjustable output by monitoring the exhaust air for odors. Warning: For commercial use only in unoccupied areas.