Save Money with Geothermal Why not utilize the readily available energy located just a few feet below the surface of your own property? A WaterFurnace geothermal system can utilize one unit of electrical energy to extract an amazing five units of energy. But what does that mean for you? It means you can condition your Southwest Michigan home for much less than your neighbors and friends. The equipment we put in your home is the most efficient geothermal products on the market today. Homeowners can realize savings up to 70% for heating, cooling, and hot water!