Geothermal heating and cooling is all about capturing the power of the earth and using it to transfer heat. Much like a refrigerator, a geothermal system has the capability to transfer heat from one location to another. With the earth absorbing almost 50% of the sun's solar energy, the end result is a fairly consistent underground temperature of 50 degrees in northern climates to 70 degrees in southern climates.
By installing a pipe system buried in the ground, heat is transferred from the earth to your home in the winter and then the process is reversed in the summer by pulling heat from your home and transferring it into the cooler ground during the summer months. This results in the most comfortable living environment you can imagine that is both earth friendly and provides substantial savings for you on your utility bills.
Basically, a geothermal system is like owning your own private utility.