Fresh-Aire UV APCO-ER2 18-32 VAC , Non-Ozone quartz 254 NM UV-C lamp for airborne germicidal disinfection The technology of the APCO is the carbon cells attracting and holding odors and microbes then catalyzing them by exposure to the UV light APCO is effective in the reductionof toxic VOC's and other odors Simple duct-mounted unit for easy installation Replaces Competitor Models: Competitor Models: RGF REME HALO , REME , GUARDIAN AIR , REMEH , QRP , Guardian QR+ , TopTECH and Similar Systems