We're Denver's Primary Geothermal Contractor! Denver, Colorado, homeowners have all kinds of reasons for wanting a geothermal heating and cooling system: remarkable year-round comfort – no matter how extreme the weather variations smooth operating performance energy efficiency (They’d be hard-pressed 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 WaterFurnace , Denver's geothermal professionals. Learn 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 WaterFurnace . We sell, install, and service WaterFurnace geothermal systems, the very best in the industry today.