The World Wide Web is full of great information about Geoexchange systems. To assist you with your information searches, we recommend the following websites:
WaterFurnace: www.waterfurnace.com
Slim Jim Lake Plate Heat Exchangers: www.awebgeo.com
International Ground Source Heat Pump Association (IGSHPA): www.igshpa.okstate.edu
Geothermal Heat Pump Consortium (GHPC): www.geoexchange.org
Ground Source New Zealand: www.groundsource.co.nz
GeoPower India: www.geopowerindia.com