Uvonair CD-800 air purifier 

Uvonair is a high output Corona Discharge generator that produces high levels of ozone. It is adjustable to match the ozone demand load for odor control as well as provide energy conservation in low demand periods. 

Ozone safely alters the molecular structure of offensive micro-organisms, to eliminate smells from plants, pets, cooking, and smoke. It also kills mould, mildew and bacteria.

The Uvonair CD-800 ozone generator will treat all odors being exhausted by an 8" (20cm) ventilation system under most circumstances. Intended for rooms up to 20,000 cu.ft. (600 m3).

Set the adjustable output by monitoring the exhaustable output by monitoring the exhaust air for odors. The Uvonair CD generator is maintenance free!

More info from the Manufacturer (PDF format - Lots of detail.)