Geothermal Retrofits More and more residents in Denver are learning just how great WaterFurnace geothermal systems are for retrofit or replacement applications. The advantages 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 simple to put in - particularly those replacing another forced-air system. Geothermal systems can be installed in areas where fossil fuel furnaces are unacceptable. That's because, with geothermal, there's no 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 Denver resident looking to retrofit or replace your current heating and cooling system, contact us, the experts WaterFurnace . We'll show you all the advantages of a WaterFurnace geothermal retrofit or replacement.