Geothermal is Big in Sunbury! Endless homeowners in Sunbury, Ohio are loving their geothermal heating and cooling system.We find it difficult to believe that anyone wouldn't? Due to our seasonal temperature extremes and good ground conditions, our geothermal systems, are the best choice for year-round heating and cooling comfort. So, you still aren't convinced? See how much you can save in Sunbury with your own geothermal system with our handy Geothermal Savings Calculator. Now that you have looked at just how much a geothermal system can save you on your monthly costs, do what so many other Sunbury homeowners have done and contact the experts at Westin Air. Our professional staff are waiting to help you plan your geothermal system and install it the right way so that you will get the most out it.