Installed in your cooling and heating system the UV light radiates a special frequency of ultraviolet light. When the contaminants come into view of the UV light; the UV light waves penetrate the cell walls and membranes of the micro-organisms. The UV light then breaks apart the DNA, killing the microbe to where it can no longer grow or multiply.
UV lights work 24 hours a day and 7 days a week disinfecting drain pans, cooling coils and air ducts exposed to UV light. Even when your cooling system is not running UV lights keep working.