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[13 Mar 2009 | No Comment | 16 views]

It was good news to learn that Energy Star has finally announced specifications for water heaters. The specification for heat pump water heaters is particularly welcome, since these products have an unusually large savings potential. A heat pump water heater can reduce water-heating energy by half, which translates into over 1,500 kWh per year in many homes. Nearly 40% of American homes use electric water heaters, so the market is huge. This market is unlikely to be tapped soon, however, because there are no significant American manufacturers of heat pump …