Geothermal is Big in New Hanover County! New Hanover County, North Carolina, residents love geothermal heating and cooling. And why shouldn't they? We've got the perfect ground conditions here. And our seasonal temperature extremes make geothermal installations the right choice for year-round heating and cooling comfort. Want to find out how much a geothermal system of your own could lower your monthly costs in New Hanover County? Check out our handy Geothermal Savings Calculator. Then do what so many other New Hanover County homeowners have done. Contact the experts at O'Brien Service Company. We'll help you plan your geothermal system, install it right, and make sure you get the service you need to get the most out of it.