The approximately 400,000 industrial and commercial boilers in the United States consume about 33 quadrillion Btu—about 25 percent of the world's energy—per year. The United States imports about 40 percent of that energy from unpredictable sources, such as the Middle East. More than 60 percent of those boilers are more than 20 years old and have operating efficiencies of 70 to 75 percent. That means the United States is wasting large amounts of fuel from precarious sources ...

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