Bio Shield UV-C Air Sanitizer System, Installs Into Furnace Duct, Cleans, Sanitizes & Freshens Air In Your Entire Home, Sanitizes Allergens & Pathogens Blowing Throughout Heating & Air Conditioning Ductwork, Short Wave UV-C Kills Or De-Activates Bacteria, Viruses & Other Infectious Organisms, Produces Sanitized Air Flow Contributing To A Healthier Home Environment, Easy To Install.