Drill and Fill: Installers thread pipe into a hole a few inches wide and over 100 feet deep. As wind and solar hog the alt-energy spotlight, this technology has remained underground.From Popular Mechanics:
Efficient and economical, geothermal heats, cools and cuts fossil fuel use at home. Whether you're in sunny Florida, or snowy New Hampshire, a ground-fed climate system can free a consumer from fluctuating energy prices and save money on power bills immediately. Here's how it works.
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