Why Geothermal Use the existing storehouse of free & renewable energy just beneath the surface Geothermal energy is the smarter way to heat and cool your home or business - it's efficient, saves you money, and protects the environment. It's hard to get much greener than with WaterFurnace. Just ask the EPA — they confirmed geothermal energy is the most environmentally conscientious heating and cooling system. Or ask the U.S. National Renewable Energy Laboratory - they also concluded that geothermal energy is more efficient and cost-effective than traditional residential systems. Or ask the federal, state, and local governments and utilities - they're providing many rebates and tax incentives that will go hand in hand with your investment in geothermal. Or, most importantly, you can speak with your neighbors - more and more people are switching to geothermal and love it! Energy and cost savings will vary by region and depend on the type of old system your new geothermal is replacing. However, geothermal will always be smarter, more cost effective and eco-friendly. By using our savings calculator, you can find out how much a geothermal system in the Manhattan, KS will reduce your energy costs.