Save your customers thousands of dollars with Energy Star heat-pump water heaters. An EPA Energy Star-certified heat-pump water heater uses half the electricity of a standard electric water heater and can save a family of four $3,500 over its lifetime. Heat pump water heaters are manufactured by the companies you know — A. O. Smith, GE, Rheem, Bradford White and more — and qualify for generous incentives through utility energy-efficiency programs.