The PHI-PKG® package unit uses RGF’s patented Photohydroionization (PHI-CELL) technology to reduce airborne and surface bacteria, viruses, odors, and mold. PHI-PKG package units are designed specifically for use in residential and commercial applications. They utilize adjustable magnetic feet with vibration dampers to attach without fasteners to the HVAC blower unit or PKG-Rack System, making installation fast and simple.