Mid-sized commercial or residential unit for installation inside the ductwork of central HVAC systems, suitable for smaller retail stores, restaurants, residential building areas such as gyms or mailrooms, or small offices.  This unit uses two 14 inch long plasma generation tubes, and is rated to treat areas up to 2,200 square feet, at rates of up to 5,000 CFM.  Smaller and larger units  are available for any possible requirement of square feet and number of CFM of air movement.