The Multizone Zone Control modules provide temperature control for one zone served by a constant volume, dual duct AHU. Typically the damper for the hot deck and cold deck are mechanically linked. For example, when the damper is open to one deck, the damper to the other deck is closed. These linked dampers are modulated to maintain a Zone Temperature setpoint. Some of the modules optionally sequence the dampers with control of a reheat coil. The multizone application supports up to eight independent zones, with the zone number designated by X (representing zones 1-8).