Why Geothermal Use the current storehouse of free & renewable energy just beneath the surface 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 classic residential systems, it only makes sense. Environmentally 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 convinced? 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 greener. By how much can a geothermal system in the Tennessee Valley, AL area save you in energy costs? Use our geothermal savings calculator to discover for yourself!