Geothermal is Big in New Hanover County! Endless residents in New Hanover County, North Carolina are loving their geothermal heating and cooling system.We find it hard to believe that anyone wouldn't? Due to our changing temperature extremes and great soil conditions, our geothermal systems, are the best choice for year-round heating and cooling comfort. So, you still aren't persuaded? See how much you can save in New Hanover County with your own geothermal system with our handy Geothermal Savings Calculator. Now that you have seen just how much a geothermal system can save you on your monthly costs, do what so many other New Hanover County residents have done and contact the experts at O'Brien Service Company. Our professional staff are here to help you plan your geothermal system and install it the right way so that you will get the most out it.