Save Money with Geothermal Why not use the readily available 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 extract an extraordinary five units of energy. Unsure of what that means to you? What you get is an economical means to condition your Greene County home - much less than what your friends and neighbors will pay. The geothermal products we place 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!