Save Money with Geothermal You already own the property - why not use the readily available energy source just underneath the surface of your yard? A WaterFurnace geothermal system can broadcast an amazing five units of energy for every one unit of electrical energy used. Not quite sure what that means to you? What you get is an economical means to condition your Lime Springs home - much less than what your friends and neighbors will pay. The geothermal products we place in your home are the most proficient equipment on the market today. So why not utilize the clean, renewable energy in your backyard and realize savings up to 70% on heating, cooling, and even hot water!