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