We're Gresham's Primary Geothermal Contractor! Gresham, OR, homeowners have all sorts of reasons for desiring a geothermal heating and cooling system: exceptional year-round comfort – no matter how extreme the seasonal variations stable operating efficiency energy efficiency (They would look forever to find a more "green," more natural way to heat and cool their homes!) significant – often extraordinary – savings on their energy bills premium installation and maintenance from Total Energy Concepts, Gresham's geothermal professionals. Find out more about what a geothermal heating and cooling system can do to increase your family's comfort. Check out our Geothermal Savings Calculator. Then contact Total Energy Concepts. We sell, install, and maintain WaterFurnace geothermal systems, the finest available today.