ENERGY STAR certified commercial water heaters include gas storage and instantaneous (tankless) units that use 25 percent less energy than a conventional commercial unit by employing more efficient heat exchangers. The label will be available for electric commercial heat pump water heaters in the future.
Current Specification Effective Date: March 20, 2013
Commercial hot water heater specification covers high–efficiency gas storage and tankless water heaters. It will also cover electric commercial heat pump water heaters in the future.