iO HVAC Controls iO-Nizer Duct Mount Ion GeneratoriO HVAC Controls iO Nizer Duct Mount Ion Generator The iO Nizer Ion Generator targets nano and micro particulates to reduce minute air contamination that can pass through filters as well as human defenses. This ionizer attracts fine particulates and respiratory irritants into filterable groups, neutralizing odors and VOC molecules that are broken down. The iO Nizer kills airborne pathogens by disrupting microbe chemical balance and is UL 867