
Building Energy Management Systems (BEMS) are hardware-software systems installed in buildings that monitor and control the energy needs of a building to ensure efficient and economical energy utilization. These systems monitor a buildings energy consumption by electrical and mechanical equipment such as heaters, ventilators, air conditioners, and lighting to increase energy efficiency, and reduce energy costs. At present, building systems are integrated for better synchronization and monitoring of data on energy usage and better optimization. The next generation of BEMS are collaborating directly with utility enterprises so that the building owners are aware of when power rates and demand are lowest, allowing proper scheduling of high power use activities to help lower their costs. Energy efficiency, energy price volatility, and government policies and incentive programs majorly drive the growth of this market. Factors such as high investment, and longer payback period are some of the challenges confronted with regards to installation and implementation of BEMS in various type of buildings.