About O'Brien Service Company Your Wilmington Area Premier Geothermal Source You can look to O'Brien Service Company for all your WaterFurnace Wilmington geothermal heating and cooling needs, including... planning assistance. complete comfort system installation. routine service and maintenance. emergency repair. energy-saving advice and consultation. In the Wilmington area, complete customer satisfaction is our utmost objective and our highly qualified professional staff will see to that. Besides, when you choose the best heating and cooling system on the market today, it is difficult to go wrong. We will see to it that your new system lives up to all of your expectations, helping you to reduce your energy costs and improve your home's conditioning efficiency. Contact O'Brien Service Company today to get a free estimate and a cost savings analysis for your home.