Why Geothermal Use what's already there - free & renewable store of energy It's not easy 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 confirming 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 Earth friendly heating and cooling system on the market today. Cost-effective - State, Federal and local government and utilities provide many tax breaks and reductions that makes your investment in geothermal a well-informed choice. Still not satisfied? You can ask 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 save you more money, smarter, and greener. By using our savings calculator, you can find out how much a geothermal system in the Columbia, South Carolina will reduce your energy costs.