Geothermal heat pumps use ground temperature air instead of outside air to provide heating, cooling and often water heating.
Released December 14, 2009
WASHINGTON — The U.S. Environmental Protection Agency is announcing new requirements for residential geothermal heat pumps (GHPs), enabling water-to-water geothermal heat pumps to earn the Energy Star label for the first time. EPA’s stringent specifications for this new category of geothermal heat pumps will help protect the environment and reduce energy costs, because GHPs that meet the new standards will be up to 45 percent more efficient than conventional pumps.
--continued on U. S. Environmental Protection Agency news
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