Why Geothermal Free & renewable source of energy - It's already there begging to be used It's hard to get much greener than WaterFurnace. The best alternative to heat and cool your home or business, geothermal is... Efficient - With the U.S. National Renewable Energy Laboratory concluding that geothermal heating and cooling is more efficient than conventional residential systems, it only makes sense. Eco-friendly - The EPA determined that geothermal energy is the most eco-friendly heating and cooling system on the market today. Cost-effective - State, Federal and local government and utilities offer many tax breaks and reductions that makes your investment in geothermal a wise choice. Still not satisfied? You can talk to your neighbors - more and more people are changing to geothermal and love it! Energy and cost savings will vary by region and the type of system geothermal is replacing, but geothermal will always be more cost effective, smarter, and environmentally friendly. Want to know how much you can expect to save on your energy costs with a geothermal system in Northern Colorado, Comfort By Nature? Find out with our geothermal savings calculator!