Why Geothermal Free & renewable source of energy - It's already there begging to be used It's hard to get much greener than WaterFurnace. A smarter alternative to heat and cool your home or business, geothermal is... Efficient - With the U.S. National Renewable Energy Laboratory determining that geothermal heating and cooling is more efficient than traditional 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 offer many tax breaks and reductions 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 save you more money, wiser, and greener. By using our savings calculator, you can find out how much a geothermal system in the Martinsburg, WV will reduce your energy costs.