Geothermal energy utilizes heat from the earth to provide energy. The U.S. has been using commercial, large-scale geothermal power plants at deep resource temperatures (between 200˚F and 700˚F) since the 1960s. Geothermal energy development and production is a thriving international market. However, to create electricity from geothermal sources, there needs to be the certain conditions. For more information about conventional geothermal electricity production, refer to the U.S. Department of Energy's website: Geothermal Basics.
Ground Source Heat Pump/Geoexchange
There are no known conventional geothermal resources suitable for power production in Pennsylvania. However, there are suitable conditions for the use of energy efficient ground source heat pump technology, also referred to as "Geoexchange" and geothermal heat pump. Ground source heat pumps can cut your heating and cooling costs dramatically. They are durable, low maintenance, and are flexible - they can be installed with a new home or retrofitted into existing homes.
Is a Ground Source Heat Pump right for you?
The US EPA’s Energy Star website is a good source of additional information if you are considering installing a ground source heat pump.