A UVC radiation system for producing decontaminated air which flows into the surroundings of the system while blocking UVC radiation from entering the surrounding environment. In one embodiment, the system comprises a first housing forming a first air chamber and having multiple side walls each having one or more UVC lamps adjacent thereto. Each side wall has air vent openings in a pattern which confronts substantially the entire length of the one or more adjacent lamps. A second housing surrounds the first housing and lamps and forms a second air chamber having one or more walls containing an air filter to permit air to flow through the filter into the surrounding environment and to prevent UVC radiation from entering the environment.
