A survey recently released by the U.S. Energy Information Administration shows that hospitals greater than 200,000 square feet consumed 5.5 percent of the total delivered energy used by the commercial building sector in 2007. According to the survey, these large hospital buildings consumed about 457 trillion British thermal units (Btu) in major fuels: 208 trillion Btu of natural gas, 194 trillion Btu of electricity, 6 trillion Btu of fuel oil and 49 trillion Btu of district heat. Conducted every four years, the Commercial Building Energy Consumption Survey also shows that most energy-intensive hospitals also had energy management and conservation plans in place.
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