Conventional zoning is usually done using electromechanical dampers that employ motors to open and close the dampers installed within the ductwork. Instead of motors, however, the Arzel system uses low-pressure air actuators to move its dampers.
Dennis Laughlin, general manager of the company, explained, “We determined that it was easier and more reliable to use air than to have a motor which has gears that would wear out and connections that would corrode, and other associated problems.”