The American-Lights® UV Air Cleaner is installed inside the air duct of home or office HVAC systems and covers up to 5,000 square feet. By treating the air which passes through the HVAC systems with ultraviolet light, American-Lights® UV Air Cleaner effectively reduces or eliminates the DNA-based airborne contaminants - bacteria, viruses, mold and spores - that cause allergy, asthma attacks, sickness and other respiratory conditions.Ultraviolet light air cleaners have been used for decades. They have been tested and implemented by companies such as General Electric and Westinghouse. The UV light air cleaners are used in hospitals, laboratories, clean rooms, doctors' offices, commercial buildings, food processing plants - any place a concern for clean air exists. With American-Lights® UV Air Cleaner this exceptional technology is available to the homeowners also. American-Lights® UV Air Cleaner BenefitsBy reducing or eliminating* airborne mold, mold spores, viruses and bacteria from the indoor air, the American-Lights® UV Air Cleaner can help: Fight sickness such as common cold, influenza, measles, small pox and tuberculosis Reduce allergy and asthma Reduce frequent headaches Reduce constant snoring Reduce nasal congestion Reduce irritability Increase personal energy Reduce fatigue and depression Fight the Sick Building Syndrome