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Geothermal wells use the earth as a heat source or sink by means of a circulating water loop. Since the system supplied both
heating and cooling, only one appliance is needed to satisfy both needs, replacing conventional boilers and air conditioning systems.
Mean earth temperatures under New York City are approximately 55 degrees Fahrenheit, making it an excellent location for the use of
geothermal wells. Initial installation and drilling costs are expensive, but once set up, ongoing operating costs are low and
represent a significant savings over traditional heating and cooling utility expenses.
More information:
http://www.dec.ny.gov/energy/1748.html
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