UVC light HVAC Air duct Purifier moduleï¼ In Duct Air Purifierï¼ is mainly install on the main tube or branch tube of the Air duct system or air conditioner system. The unique UVC light+PCO Tio2 technology will bring a 360 Purification and disinfection for the room, No secondary pollution. Suitable for install in Air ventilation system like in shopping mall, airport, or other public big office buildings.