- Geo-Heat Center
http://geoheat.oit.edu/
Information for the prospective owner from the Oregon Institute of Technology. Includes technology background, terminology and description of various mechanisms.
- Geoexchange
http://www.geoexchange.org/
Information on the technology from the U.S. Geothermal Heat Pump Consortium. Includes detailed case studies of applications, publications, statistics and facts.
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