Save Money with Geothermal You already purchased your property - why not use the readily available energy source just below the surface of your yard? A WaterFurnace geothermal system can distribute an astounding 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 Mobile home for far less than your neighbors and friends. The equipment we put in your home is the most economical geothermal products in the industry today. Homeowners can realize savings up to 70% for heating, cooling, and hot water!