: Fifty Fremont earned an Energy Star rating of 96 out of 100 due to installation of energy conserving infrastructure and operational commitments to use less energy. The retrofit makes the building 52 percent more energy efficient than a similar sized office building. Additional energy use is offset through the purchase of Green-e certified power. A building management system monitors and controls the building HVAC system giving constant feedback of system operation. It optimizes major building HVAC systems such as fans, boilers and chillers resulting in greater efficiency and occupant comfort. A large lighting retrofit using highly efficient low-mercury lamps and LED technology also contributes to energy savings.