Geothermal heat pumps (GHPs) take advantage of the earth’s relatively constant temperature (~50-55° F) to provide efficient heating and cooling. A GHP system collects the earth’s natural heat through a fluid-filled series or loop of pipes made of copper or plastic that is installed below the surface of the ground. The pipes can also be submersed in a body of water such as a lake or pond. Fluid circulating in the pipes carries the earth’s heat to the home. In the winter, an electric compressor and heat exchanger concentrates the earth’s heat and releases it into the home at a higher temperature and then distributes it through ductwork or pipes. In the summer, the process is reversed so that excess heat is drawn from the home, expelled to the pipes and absorbed by the earth. Geothermal heat pumps can also use the waste heat from air conditioning to provide “free” hot water heating in the summer. Rebates for the installation of Geothermal heat pumps in homes are available from the Connecticut Energy Efficiency Fund.
If you have questions about Geothermal Heat Pumps or the rebates for them, you can speak with an energy professional at Connecticut's Energy Information Line, 877-WISE-USE (947-3873) weekdays, during business hours.
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