UV air purifiers are not just for allergies. UV is known to destroy many virus types, mold, and bacteria. If you suffer from asthma or allergies you should consider germicidal air purifier methods. If you have a newer home you need UV air. New homes are built air tight. The Blue UV Air Purifier produces 24,000 microwatts of UVGI - ultraviolet germicidal irradiation every second!