Save Money with Geothermal Why not use the readily available energy located just a few feet below the surface of your own property? A WaterFurnace geothermal system can use 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 Medina home for much less than your neighbors and friends. The equipment we put in your home is the most economical geothermal products on the market today. Homeowners can actually get savings up to 70% for heating, cooling, and hot water!