For more independent information about Geothermal Heating and Cooling Systems as well as how to conserve energy, please visit the following sites.

• http://www.geoexchange.org
• http://www.igshpa.okstate.edu/
• http://www1.eere.energy.gov/geothermal/heatpumps.html
• http://my.epri.com/
• http://www.energystar.gov/index.cfm?c=geo_heat.pr_geo_heat_pumps
• http://www.heatpumpcentre.org/
• National Well Driller Locator
• NCFI Polyurethanes