A server comprises an input/output port for sending and receiving data via a network, a data storage device and a controller for maintaining a master schedule for energy management. The server utilises sources such as smart building sensors, energy meter readings, lighting systems, heat and ventilation control systems, building usage profiles, energy targets, predictive services such as weather forecasts, energy tariffs and energy availability from alternative renewable sources in order to determine an optimised schedule. The usage profile may include room occupancy calendars, movement detectors, security systems, calendars, temperature set points and profiles, lighting themes and profiles, social data and events diaries. The controller maintains the master schedule, which may be updated over the network. A sub-portion of the master schedule may be translated into a basic schedule with at least one day less than the master schedule and delivered to a controller.
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