Geothermal energy: Hot water or steam extracted from reservoirs beneath the Earth's surface that can be used for heat pumps, water heating, or electricity generation. The term may also mean the use of near-constant underground temperatures by ground-source heat pumps to provide heating and cooling. Synonyms include ground-source heating.
NYSERDA's website has more information on geothermal heat pumps for all types of buildings, including residential and commercial.
ENERGY STAR geothermal heat pumps are over 45% more energy efficient than conventional options. A federal tax credit is available to homeowners who install an ENERGY STAR geothermal heat pump.
Last updated April 10, 2018