Safe-T GuardUV Germicidal Air Purifier destroys airborne pathogens by generating a controlled region of germicidal UV light in the upper regions of a room. Pathogens are drawn through the UV lamp chamber, exposing them to high-intensity germicidal UV light and then released into the upper air of the room where they are exposed to additional focused UV light. The UV light disinfection field is restricted to the upper area of the room (must be installed at least seven feet from the floor).