Geothermal Retrofits More and more residents in Wilmington are learning just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The gains are obvious: WaterFurnace geothermal systems are among the most dynamic, energy-saving, eco-friendly heating and cooling solutions in the industry today. Nearly all geothermal units are easy to to place in your home - particularly those replacing another forced-air system. Geothermal systems can be installed in areas where fossil fuel furnaces are unsuitable. That's because, with geothermal, there's no combustion and thus no need to vent exhaust gases. Geothermal technology is optimal for in-floor radiant heating, because heated water radiates throughout pipes under your floors to heat your rooms. If you're a Wilmington resident looking to retrofit or replace your current heating and cooling system, contact us, the experts O'Brien Service Company. We'll show you all the advantages of a WaterFurnace geothermal retrofit or replacement.