Why Geothermal Use what's already there - free & renewable supply of energy It's not easy to get much greener than WaterFurnace. The best method 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 conventional 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 incentives and rebates that makes your investment in geothermal a wise choice. Still not convinced? You can ask 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 using our savings calculator, you can discover how much a geothermal system in the Reading, PA will cut your energy costs.