The VZC monitors the status of the individual zones. These zones vote for either heating or cooling based on how the current zone temperature deviates from the current zone temperature setpoint. The VZC processes the votes, determines whether the RTU should provide heating or cooling to the zones, and commands the RTU to the appropriate mode based on this decision. The VZC continues to use the appropriate zones and change the operating mode of the RTU as needed to accommodate the zone’s needs.