Save Money with Geothermal Free energy is waiting to be used and it's only several feet underneath the surface of your backyard. What are you waiting for? A WaterFurnace geothermal system pulls an incredible five units of energy for each electrical unit of energy used. Not quite sure what that means to you? What you get is an efficient means to condition your Columbia home - much less than what your friends and neighbors will pay. The geothermal products we put in your home are the most efficient equipment available today. So why not utilize the clean, renewable energy in your backyard and get your savings up to 70% on heating, cooling, and even hot water!