AKTIV8™ Dual is the best choice when there is not enough room over the coil. It includes a 2nd UVC light for coil disinfection. AKTIV8 actively improves the indoor air quality and HVAC equipment efficiency within the home or building. It neutralizes biological contaminants such as mold, bacteria and viruses that circulate through the ventilation system. AKTIV8 (patent pending) is highly effective in helping to maintain a clean coil free from odor-causing and efficiency-robbing mold and biofilm.