Save Money with Geothermal Free energy is just sitting there waiting to be used and it's only several feet below 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. Still not convinced? Look at it this way. You condition your Tennessee Valley home with free energy - for far less than your neighbors using classic heating and cooling means. We place in your home geothermal products that put to use that free, clean energy lying in your backyard. Get your savings up to 70% on heating and cooling your home - you can even heat your water for no cost during the summer!