Energy Consumption in Buildings
Between 1980 and 2009 energy consumption in the U.S. buildings increased by 48%. Shares of the primary energy sources used by the U.S. buildings sector were:
- 75% came from fossil fuels,
- 16% from nuclear generation, and
- 9% from renewable.
In 2010, building sector consumed 41% of the primary energy sources, 30% the industrial sector, and 29% the transportation sector. Energy Information Administration (EIA) predicts that by 2035 the energy consumption will increase steady by 27% in buildings sector, 31% in industry cector, and 28% in transportation sector. The consumption of natural gas will increase by 17%. Use of non-hydroelectric renewable resources, including wind, solar, and biofuels, is expected to increase of 109%.
The energy used for space heating and cooling, hot water supply, lighting will be close to 70% of total energy in building. The remaining 30% of energy will be used by appliances and ventilation.