Geothermal Retrofits More and more residents in Knoxville are discovering just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The advantages are obvious: WaterFurnace geothermal systems are counted as one of the most economical, energy-saving, eco-friendly heating and cooling solutions in the industry today. Nearly all geothermal units are easy to install - 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 isn't any combustion and therefore no need to vent exhaust gases. Geothermal technology is ideal for in-floor radiant heating, because heated water radiates throughout pipes underneath your floors to heat your rooms. If you're a Knoxville resident looking to retrofit or replace your current heating and cooling system, contact us, the experts Smith and Associates Geothermal. We'll walk you through all the advantages of a WaterFurnace geothermal retrofit or replacement.