Control system for climate conditioning of a building zone

A control system for a building zone which is climate conditioned by a climate conditioning system, wherein the climate conditioning system controls at least one climate parameter in the building zone, the climate parameter being at least one of:

• temperature and humidity,
• the control system comprising:
• a control interface to a building management system, wherein the building management system is configured to receive, via the control interface, a climate parameter target for the climate parameter and to control the climate conditioning system to establish the climate parameter in the building zone in accordance with the climate parameter target;
• a sensor interface for receiving a climate parameter measurement of the climate parameter from within the building zone;
• a processor subsystem configured to periodically calculate the climate parameter target for respective control periods by, in a current control period:
• calculate a current running average value based on the climate parameter measurement and a previous running average value;
• if a difference between the current running average value and the previous running average value exceeds a maximum rate of change per control period, limit the current running average value to remain within the maximum rate of change;
• calculate an upper bound and a lower bound for the climate parameter based on the current running average value, the upper bound and the lower bound defining a permissible climate parameter range;
• determine the climate parameter target based on the permissible climate parameter range so as to cause the climate parameter to reach, or remain within, the permissible climate parameter range;
• and
• via the control interface, output the climate parameter target to the building management system.