Save Money with Geothermal Free energy is just sitting there waiting to be used and it's only several feet beneath the surface of your backyard. What are you waiting for? A WaterFurnace geothermal system reclaims an amazing five units of energy for each electrical unit of energy used. Not quite sure what that means to you? What you get is an economical means to condition your Tennessee Valley home - much less than what your friends and neighbors will pay. The geothermal products we place in your home are the most dynamic equipment on the market today. So why not use the clean, renewable energy in your backyard and grab a hold of savings up to 70% on heating, cooling, and even hot water!