The EWC Controls NCM-3Z Zone Control System is an HVAC zoning panel designed to manage two or three separate air zones in residential and light commercial buildings. It works with compatible thermostats and motorized dampers to direct conditioned air according to each zone’s heating or cooling demand. Suitable for compatible gas, oil, electric, hydronic, and heat pump systems, it supp... https://www.partshnc.com/ewc-controls-ncm-3z-zone-control-system-2-or-3-zones-2-heat-1-cool