Save Money with Geothermal You already own the property - why not utilize the readily available energy source just below the surface of your yard? A WaterFurnace geothermal system can transmit 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 Central New Jersey home for much less than your neighbors and friends. The equipment we put in your home is the most proficient geothermal products available. Homeowners can actually get savings up to 70% for heating, cooling, and hot water!