Most of the application of ozone has been for the treatment of water. Recently, ozone increasingly is being employed commercially for air treatment odour control (removal of VOCs (Volatile Organic Compounds) from the air). This is conveniently and practically achieved by integrating the ozone generator system into the HVAC system. Ozone sensors are installed to maintain ozone concentrations at an optimum level. The majority of projects so far are for the gaming and hospitality industries like casinos, hospitals, shopping malls etc. where there is a high return on investment in systems which create and maintain high quality air. It has been found that ozone works well with particulate filters. It eliminates the need for costly carbon VOC filters and reduces the makeup air required which is costly to condition.
Ozone reduces VOCs more effectively than carbon, has no replenishment expense, oxidizes residual VOCs from finish surfaces, reduces demand for outside air, eliminates the growth of microbial matter inside the condensate drip pans, coils and heat exchangers, and ductwork. Ozone offers superior performance to any other method currently in use for gas, odor, and VOC control; has benefits which none of the other strategies offers; and results in lower ownership costs due to lack of replenishment expense and decreased make-up air heating and cooling requirements