Just 5 or 6 feet below ground, it’s about 50 degrees year-round, and that heat production becomes more consistent the deeper you go, said Gregory Nemet, professor of energy and climate policy at UW-Madison. It makes sense for large developments like the Belle Farm Neighborhood to use energy sources like geothermal, as the infrastructure needed is minimal, Nemet said: essentially digging a hole in the ground and installing coils and connecting that to an HVAC system for heating and cooling.
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