According to 2018 CBECS data (Energy Star Portfolio Manager), a typical office building in the United States has an Energy Use Intensity (EUI) of 52.9 kBTU/square foot. Since the area of the building is approximately 24,350 square feet, the total energy consumption is 1,288,115 kBTU, or 377,524 kWh. From the energy data for the past four years, we can see that the energy consumption in the CSL building is consistently much lower than a conventional office building in America