Castle Rock, Colorado, Geothermal WaterFurnace is the top WaterFurnace geothermal contractor in Castle Rock, Colorado. We'll help you understand all the benefits of geothermal heating and cooling. We’ll make sure your WaterFurnace system is properly installed, too. And when it comes time for service? Nobody in Castle Rock does it better! Contact WaterFurnace today. Like a little sneak-peek at the savings a WaterFurnace geothermal heating and cooling system can provide? Use our easy Geothermal Savings Calculator.