An expansion project at a Greenwood manufacturing facility will use geothermal technology to heat and cool two massive buildings, highlighting a trend that proponents say reduces energy costs while championing sustainability.

Endress+Hauser’s geothermal system will tap into energy stored below the Earth’s surface –in this case, 14 feet deep in a retention pond — for a stable, year-round heating and cooling source for buildings totaling 190,000 square feet.

While Endress+Hauser’s project is unique to Greenwood, Geothermal Heating and Cooling technology is taking root on a much bigger scale statewide, according to Joe Meyer, owner of Greenwood-based KOE Engineering & Surveying, which designed the system.

Witness Ball State University’s project, labeled the nation’s largest ground-source, closed-loop district geothermal system.