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Reviewed on July 1, 2015 | Science and Technology
Lloyd expands his 2011 Smart Guide to Geothermal by delving deeply into the nifty science behind ground-source heating. "Simple in concept, complex in practice," geothermal heat pump systems (GHPs) use the earth as both a heat source and heat sink. Heat is transferred from ground to building via an underground piping loop that uses soil temperature to warm or cool the refrigerant (or water) circulating within. Various kinds of ground-sourc...Log In or Sign Up to Read More