The STERIONIZER is an air purification device based upon a patented bipolar ionization technology, specifically developed to bring the health and quality of nature's air to indoor environments. The SterionizerTM Duct Unit The Sterionizer TM Duct Unit is designed for adding ionizing technology into air ducts and other closed areas with an air flow. The unit is maintenance free with innovative patented self-cleaning emitters. In addition, the unit includes a Modbus communication port that can easily be connected to any building management system. It is easy to install the unit in any duct utilizing the pre-drilled flange and factory applied gasket. When installed at appropriate points, the unit keeps the duct system clean and ensures that the air supplied is ionized.