Ball State starts final phase of nation's largest geothermal system
Ball State (Muncie, Ind.) has started the second and final phase of converting to a geothermal ground-source heat pump system - the largest project of its kind in the United States. The conversion started in 2009 to replace the coal boilers. It now provides heating and cooling to nearly half the campus. The university expects to save $2 million a year in operating costs once the system is complete. Phase 2 includes installation of 780 of the remaining 1,800 boreholes in a field on the south area of campus.