Ozone generator What is ozone? Ozone (o3), an activated form of oxygen, is one of the most powerful oxidizing and cleaning agents known to man, 150% stronger and 3, 000 times faster reacting in aqueous solution than chlorine. It occurs naturally when an electrical charge such as lightning passes through the air or when ultraviolet light reacts with oxygen in the atmosphere. A highly effective biocide, fungicide and deodorizer, ozone almost instantly disinfects water on contact. 355mm high x 178mm wide x 101mm deep (14" x 7" x 4") wall mounted type