Save Money with Geothermal You already purchased your property - why not use the free energy source just below the surface of your yard? A WaterFurnace geothermal system can distribute an amazing five units of energy for every one unit of electrical energy used. But what does that mean for you? It means you can condition your Rochester home for much less than your neighbors and friends. The equipment we place in your home is the most efficient geothermal products in the industry today. Homeowners can actually get savings up to 70% for heating, cooling, and hot water!