Conventional heating, ventilating, and air conditioning(HVAC) systems usually achieve the desired controllevel by means of simple ON–OFF control, which can oftenresult in high energy wastage. A potential solution to thisissue is intelligent self-regulating HVAC controllers, which basetheir actions/decisions on sensor data. In this paper, an officeclimate monitoring and control system is designed and implemented.The system consists of various wireless sensor nodesand a control node. The sensor nodes provide the sensor datanecessary to determine occupancy and the control node executesthe algorithm, which decides whether to activate cooling orheating based on the sensor data. This system can serve asa controller and can be integrated into HVAC systems in smartbuildings. It is shown that the developed control algorithmexecuted on the control node results in an improvement of upto 39% in energy efficiency over conventional ON–OFF controllersfor HVAC systems.
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