Save Money with Geothermal Why not use the free energy located just a few feet beneath the surface of your own property? A WaterFurnace geothermal system can utilize one unit of electrical energy to generate an extraordinary five units of energy. Not quite sure what that means to you? What you get is an efficient means to condition your Williamsport home - much less than what your friends and neighbors will pay. The geothermal products we put in your home are the most efficient equipment on the market today. So why not utilize the clean, renewable energy in your backyard and grab a hold of savings up to 70% on heating, cooling, and even hot water!