Geothermal Retrofits More and more residents in Western North Carolina are realizing just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The gains are plain to see: WaterFurnace geothermal systems are among the most efficient, energy-saving, eco-friendly heating and cooling solutions available. Nearly all geothermal units are simple to put in - particularly those replacing another forced-air system. Geothermal systems can be installed in areas where fossil fuel furnaces are unacceptable. That's because, with geothermal, there isn't any combustion and thus no need to vent exhaust gases. Geothermal technology is perfect for in-floor radiant heating, because hot water radiates throughout pipes underneath your floors to heat your rooms. If you're a Western North Carolina resident looking to retrofit or replace your current heating and cooling system, contact us, the experts Bullman Heating & Air. We'll show you all the advantages of a WaterFurnace geothermal retrofit or replacement.