Geothermal Heating Systems – What is Geothermal Heating?
What is Geothermal Heating – In the United States, the number of homes that have been installed with geothermal heating systems has grown from about 6,000 in 1980 to more than 40,000 today. The technology was first developed in Iceland in the 1950s and is now being used throughout the world. What is Geothermal Heating …