AKTIV8™ is the best choice when there is enough room over the coil. 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.