Siemens Building Technologies offers a range of fire safety and combustion control products. It provides various heating, ventilation and air conditioning products, such as damper actuators, sensors, valves, thermostats and variable frequency drives. The company also offers building automation and control products, including field panels and zone control units. Siemens Building Technologies maintains more than 100 branch offices throughout the United States. It serves commercial office buildings, public housing units, and data center, industrial, government and health care facilities. The company provides systems integration, energy conservation and life cycle management services. Siemens Building Technologies offers products from Apogee Electronics Corporation. It is a part of Siemens AG, which is one of the leading electronic and information technology companies in the world.