Image Credit

Description:

Energy Science project diagram on the left shows how a geothermal heat pump works. On the right is a photograph of an installed geothermal heat pump.

Source:

U.S. Department of Energy; Assembled by M. Maranowski

License:

Public domain, government website

Source URL:

http://www1.eere.energy.gov/geothermal/heatpumps.html

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