... reason ultraviolet purifiers are commonly used in hospitals. As contaminated air is passed through intense ultraviolet light in the photo-catalytic ... , Yacht Cabins, Auto, Bedroom, Living room, Cookroom, Hospital, Etc..·Filters: Cotton filtering effect early, HEPA Filter, Activated Carbon and Photocatalytic.·UV: 254nm ... Carbon: 3 to 6 months, Photocatalytic: 12 months.·MOQ: 500pcs. room air purifier