Ultraviolet germicidal irradiation (UVGI)

Radiation at 254 nm, produced within the UV-C region of the electromagnetic spectrum. UVGI prevents microbial replication by inactivating both bacterial and viral deoxyribonucleic acid (DNA). The most practical and effective application uses wall or ceiling-mounted UVGI fixtures to create an upper room air disinfection zone. Good mixing of air between the upper and lower room is required to allow effective disinfection of air in the lower part of the room where people breathe (the lower breathing zone).