average energy consumption per sq ft per sector
Across the United States, the average annual energy intensity for office buildings is 79.8 kBtu per. square foot and the average cost is $1.65 per square foot. Of the total energy consumption, 66%. is for electricity and 34% is for natural gas and other fuels. This translates to 15.5 kWh per square. foot of electricity and 0.27 therms per square foot of natural gas1. As show in Figure 2, space conditioning and lighting together account for 70% of all energy. consumed in a typical office building, with an additional 20% of energy consumption used to.