The International Association of Air Cleaner Manufacturers offers a free ozone test kit.
Bionaire makes three lines of air purifiers, the EverFresh Air Exchange System, the PermaTech Filter Air Cleaner, and the replaceable filter air cleaner line.
The Duel Position Air Cleaner is a small purifier unit, ideal for small spaces or placing on furniture.
The Duel Position Air Cleaner can sit vertically or horizontally.
The Tower Air Cleaner is slightly larger then the Dual Position Air Cleaner purifier and is recommend for room sizes up to 12 feet by 12 feet.