Why Geothermal Use the current surplus of free & renewable energy just beneath the surface It's difficult 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 conventional residential systems, it only makes sense. Environmentally friendly - The EPA determined that geothermal energy is the most eco-friendly heating and cooling system on the market today. Cost-effective - State, Federal and local government and utilities offer many tax breaks and reductions that makes your investment in geothermal a wise choice. Still not satisfied? 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 save you more money, wiser, and greener. By using our savings calculator, you can discover how much a geothermal system in the Portland, OR, WA will cut your energy costs.