Geothermal Retrofits More and more residents in Charleston are discovering just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The benefits are plain to see: WaterFurnace geothermal systems are among the most economical, energy-conserving, eco-friendly heating and cooling solutions available. Nearly all 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 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 hot water radiates through pipes underneath your floors to heat your rooms. If you're a Charleston resident looking to retrofit or replace your current heating and cooling system, contact us, the experts Custom Climate Heating & Air. We'll walk you through all the advantages of a WaterFurnace geothermal retrofit or replacement.