1. A supervisory controller for a heating, ventilation, and air conditioning (HVAC) system, comprising: a data management module configured to receive a zone demand signal from a local controller of a zone of the HVAC system and receive a number of additional signals from a number of sensors; and a parameter identification module configured to determine, based on the zone demand signal, whether the zone is in a comfort state by: loading a best model structure of a number of models; and identifying parameters of the best model structure based on data received from the data management module.