We're the Geothermal Source in Northeast Columbia! Northeast Columbia residents in the know look to WaterFurnace for all their geothermal heating and cooling needs. They count on us to give not only the correct installation and service but also the insight to help them get the most from their geothermal systems. Thinking about a geothermal system of your own? Give our nifty little Geothermal Savings Calculator a try. Just load it with your data and stand in awe of the results. Then, contact us, the Northeast Columbia, South Carolina, geothermal experts at WaterFurnace.