We challenge you find any geothermal system that will out perform an ETA system
Earth To Air Systems DWDX Geothermal Heating and Cooling History of the Revolution Earth to Air Systems was originally founded in 2002, to develop, patent, and market deep well direct exchange (DWDX) geothermal energy heating and cooling technologies. Over five years the extensive development process involved millions of dollars spent in testing and perfecting the process. The result is a fully internationally patented Deep Well Direct Exchange (DWDX) geothermal system that has been successfully operating in hundreds of installations.
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