The metadata inference function classifies BAS labels into groups of the relevant sensor and actuator types, and then associates the labels to the corresponding AHU or zone.

The metadata inference function is particularly unique from the other functions in the toolkit as it does not generate any KPIs or visuals intended to identify energy deficiencies or opportunities for energy optimization. This function serves as a pre-processing tool to identify the relevant metadata labels for the AHU- and zone-level HVAC control network trend data. The relevant data points are listed in Table 1 for the AHU level, and Table 2 for the zone level. Thus, this functions outputs a table of the labels and controller address IDs which were identified to represent the relevant data points.