Geothermal Retrofits More and more residents in Defiance are discovering just how great geothermal systems are for retrofit or replacement applications. The advantages are easy to see: Geothermal systems are among the most efficient, energy-conserving, eco-friendly heating and cooling solutions on the market 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 unfitting. That's because, with geothermal, there isn't any combustion and thus no need to vent exhaust gases. Geothermal technology is optimal for in-floor radiant heating, because heated water radiates throughout pipes below your floors to heat your rooms. If you're a Defiance resident looking to retrofit or replace your current heating and cooling system, contact us, the experts Schlatters Plumbing Heating & AC. We'll walk you through all the advantages of a geothermal retrofit or replacement.