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SPIE Professional: Bonus Web Content

DOE Makes ENERGY STAR Rating Available for Water Heaters

New residential water heaters, including those using solar thermal energy, can earn ENERGY STAR rating.

The U.S. Department of Energy (DOE) has announced the availability of ENERGY STAR® residential water heaters, including those powered by solar thermal energy.

Introduction of the new rating can provide significant potential savings to consumers. In five years, the new water heater criteria are expected to save American consumers $823 million in utility costs, avoid 4.2 million tons of carbon dioxide emissions, and achieve cumulative energy savings of more than 3.9 billion kilowatt-hours and 270 million therms of natural gas. That's enough energy to power more than 375,000 homes for a year, according to the DOE.

Water heating represents up to 15.5% of national residential energy consumption, the second largest end use of energy in homes, following heating and cooling, the DOE said.

Using one of five specified water heating technologies, ENERGY STAR® qualified water heaters can reduce water heating bills from 7.5% to as much as 55%. 

The ENERGY STAR® program now addresses every major residential appliance found in most American homes.

More information

DOI: 10.1117/2.4200901.47

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