Geo Thermal Viability
The Hidden Genius of Geothermal HVAC Systems by By Douglas Elbinger at Renewable Energy World This gives you the block view of home Geo Thermal and some history. Very general description. No secret revealed, but a well written start for anyone interested. I had an Uncle install this type of system at his home and he seen a 65% savings in heating cost 20 years ago.
For more than 60 years, geothermal HVAC systems have been used in the U.S. and around the world. They work with nature, not against it. They can heat and cool a home or commercial building without burning any fuel or emitting greenhouse gases.
Consider that sustainable home building accounted for 20 percent of all new homes in the U.S. last year and the Wall Street Journal reported that sustainable housing will grow from $36 billion a year to as much as $114 billion a year in 2016, approaching 35 percent of the entire housing market. This is not a new technology; it is not a science experiment, and certainly not rocket science. In fact, in many European countries, geothermal heating and cooling is the standard. In Sweden and Switzerland more than 75 percent of new homes have geothermal. The U.S. Department of Energy and the U.S. Environmental Protection Agency have acknowledged that geothermal HVAC systems are the most energy efficient, environmentally clean, and cost-effective space conditioning systems available.