As a market leader in Building Management, Heating Ventilating & Air Conditioning (HVAC) Control Systems, Security System & Fire Alarm Systems, Electrical Solutions, Energy & Environmental Solutions, Siemens provides innovative solutions that enhance the comfort and safety of residents, increase energy efficiency and optimize the management of your buildings' technical infrastructure worldwide. Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment. BT provides a package energy saving solutions to our customers, which includes energy analysis, energy upgrade and energy management to customers' existing and new buildings.