According to the U.S. Environmental Protection Agency, geo-exchange systems save homeowners 30–70 percent in heating costs, and 20–50 percent in cooling costs, compared to conventional systems.
Po mišljenju Američkog EPA-a (Environmental Protection Agency), geotermalni sustavi u kućanstvima smanjuju troškove grijanja za 30 do 70%, te hlađenja za 20 do 50% u odnosu na konvencionalne sustave.