Why Geothermal Use what's already there - free & renewable supply of energy It's not easy to get much greener than WaterFurnace. A smarter method 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 in the industry today. Cost-effective - State, Federal and local government and utilities provide many tax incentives and discounts that makes your investment in geothermal a reasonable choice. Still not satisfied? You can talk to your neighbors - more and more people are switching 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, wiser, and environmentally friendly. By how much can a geothermal system in the Terre Haute, IN area save you in energy costs? Use our geothermal savings calculator to discover for yourself!