Building Automation System Building Automation systems are critical to the operation of high-performance buildings. The primary goal is to realize significant savings in energy and reduce cost. Smart building controls provide advanced functionality through a computerized, intelligent network of electronic devices designed to monitor and control the mechanical, electrical, lighting and other systems in a building. Advanced technology allows the integration, automation, and optimization of any building system in support of facilities management and the building’s operation and performance.The key function of the building automation system is to increase user comfort at reduced operation cost. To this end, building automation systems (BAS) make use of optimized control schemes for heating, ventilation, and air-conditioning (HVAC) systems, lighting, and shading. Improvements in energy efficiency will also contribute to environmental protection.