Induct 5000 Air Purification System (Duct Mounted) INDUCT 5000 AIR PURIFICATION SYSTEM (DUCT MOUNTED) BY ACTIVTEK ENVIROMENTAL - FOR UP TO 5000 SQ. FT. 5 TECHNOLOGIES: UV, UVX CATALYTIC, FR-TYPE IONIZATION, NEEDLE POINT IONIZATION, AND CORONA DISCHARGE PLATE.