Mid-sized commercial unit for installation inside the ductwork of central HVAC systems, suitable for retail stores, restaurants, residential building lobbies, or offices.  This unit uses four 14 inch long plasma generation tubes, and is rated to treat areas of between 4,400 to 6,600 square feet, at rates of up to 6,500 CFM.  Smaller and larger units  are available for any possible requirement of square feet and number of CFM of air movement.