From the Seattle Times: Home homeowners chase down high-tech solar panels and efficient appliances to make their houses environmentally friendly. Others eschew the latest technology in favor of something far more basic: caves. Geothermal heating and cooling systems work just as caves do: The temperature underground is more moderate than the air above. If it's 85 degrees outside, it's cool in the cave. If it's 25 degrees outside, the cave is still 50 to 60 degrees.
Geothermal heating puts homes in touch with the Earth
Yours,
Berlin Technologies



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