Buildings nowadays are usually furnished with various modern equipment and facilities such as electricity and fuel supply, lighting, heating, ventilation, air-conditioning, plumbing and drainage systems, plumbing fixtures, lifts and escalators, fire engineering, security and alarm, and communication systems.
Building services engineering plays a significant role in solving complicated issues in the building environment through the application of engineering principles. The profession works across a wide spectrum of mechanical and electrical services in buildings: design and installation, testing and commissioning, operation, maintenance and upgrading of various systems in order to provide the occupants of the office buildings, hospitals, schools, factories, residential buildings, etc with a comfortable, healthy, functionally effective and safe environment.