Geothermal Retrofits More and more residents in Columbia are learning just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The gains are clear: WaterFurnace geothermal systems are counted as one of the most economical, energy-saving, environmentally friendly heating and cooling solutions on the market today. Most geothermal units are a breeze 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's no combustion and therefore no need to vent exhaust gases. Geothermal technology is perfect for in-floor radiant heating, because heated water radiates through pipes under your floors to heat your rooms. If you're a Columbia resident looking to retrofit or replace your current heating and cooling system, contact us, the experts WaterFurnace. We'll show you all the advantages of a WaterFurnace geothermal retrofit or replacement.