Geothermal Retrofits More and more residents in Terre Haute are discovering just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The gains are easy to see: WaterFurnace geothermal systems are among the most efficient, energy-saving, eco-friendly heating and cooling solutions available. 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 unfitting. That's because, with geothermal, there's no combustion and therefore no need to vent exhaust gases. Geothermal technology is ideal for in-floor radiant heating, because hot water circulates throughout pipes under your floors to heat your rooms. If you're a Terre Haute resident looking to retrofit or replace your current heating and cooling system, contact us, the experts Andrews Heating & Air Conditioning, Inc.. We'll walk you through all the advantages of a WaterFurnace geothermal retrofit or replacement.