Geothermal energy is a renewable energy source because the heat is continuously produced inside the earth. The word geothermal comes from the Greek words geo (earth) and therme (heat). Geothermal heating units use the earths natural heat to warm and cool your home for sustainable, environmentally friendly comfort. The ground stays a relatively constant temperature throughout the seasons, providing a warm heat source in the winter and a cool heat sink in the summer that keeps your home with constant comfort. The EPA and the U.S. Department of Energy recognize geothermal systems as the most environmentally friendly, energy efficient, and cost effective way to heat and cool a home. Geothermal does not emit carbon dioxide, carbon monoxide, or other greenhouse gases that contribute to air pollution.
Every geothermal heating and cooling system has three major subsystems or parts: