Geothermal Retrofits More and more residents in Manhattan are realizing just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The benefits are clear: WaterFurnace geothermal systems are counted as one of the most dynamic, energy-conserving, eco-friendly heating and cooling solutions available. Most geothermal units are easy to put in - 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 optimal for in-floor radiant heating, because hot water circulates through pipes below your floors to heat your rooms. If you're a Manhattan resident looking to retrofit or replace your current heating and cooling system, contact us, the experts Carlson Heating & AC, LLC. We'll walk you through all the advantages of a WaterFurnace geothermal retrofit or replacement.