The VirBuster 20000 ozone generator has an output of 20,000 mg O3 per hour, and is suitable for areas ranging from 100 m2 to areas of several hundred square meters. It is best used to disinfect medical facilities , theaters or cinemas . It cleans the air in two hours in areas with an area of up to 300 m2. Model VirBuster 20000A is controlled by a mechanical timer, model VirBuster 20000E by an electronic timer with a bargraph of the process.