Facility Type

423,550 square-foot hospital

Installed Equipment

Geothermal System

DP&L Rebate


Expected Annual Electric Cost Savings



Reduced from 6.5 years to 5.3 years with DP&L rebate

After completing construction on a $40 million, 72,570-square-foot, five-story west wing Kettering Health Network’s Grandview Medical Center in Dayton has ensured that patients have access to quality health care facilities for years to come.

Grandview Medical Center Dayton Ohio

The hospital also saw an opportunity to become more energy efficient and reduce long term utility costs. Grandview leaders opted to replace the hospital’s 30-year old cooling system with a new geothermal design utilizing two aquifer sourced 200 foot wells and three 600-ton water cooled chillers.

 “In the end we were able to shut down two 375-ton, a 425-ton and a 60-ton existing chillers plus 100 tons of old roof top compressor units,” said Scott Wolfe, Manager of Construction and Projects for Grandview Medical Center.

With this upgrade, Grandview qualified for a DP&L Custom Rebate for Existing Buildings.  DP&L Custom Rebates are available for customers with innovative technologies or process changes that decrease energy consumption.

DP&L conducted an electrical usage study for the old system and the new system in order to quantify the energy savings. The rebate calculations were based on those portions of electric usage attributable to just the chilled water system. The study compared interval data for a year before the new chilled water system came online to the year after the new chilled water system came online.

“Grandview brought this unique project to our attention in 2010,” said Stefanie Campbell, DP&L Manager of Energy Programs. “We worked with them to develop a comprehensive evaluation plan, and were very appreciative of their cooperation and patience over the course of a project partnership that spanned multiple years.”

The original chilled water system provided cooling to 423,550 square feet of the 482,420 square feet of structures that form the main hospital campus. The new chilled water system added cooling for the hospital’s 72,570-square-foot West Wing addition.

Staff and patients began occupying the West Wing in June 2012.

“The new chiller system has allowed us to provide additional cooling capacity throughout the existing hospital facilities using less electricity for increased patient care and comfort,” said Ray Thies, Manager of Facilities for Grandview Medical Center. “With the old system we had to raise our chilled water temperatures when the cooling towers could not keep up with demand. This affected our ability to provide sufficient cooling to certain areas of the campus. With the geothermal system we are able to efficiently provide chilled water to the entire campus at a lower cost.”

Most of the anticipated electrical energy cost savings come from state-of-the-art chillers, pumps, variable frequency drives and controls; the 58-degree condenser loop water temperature from the geothermal wells. Additional savings were achieved by eliminating cooling tower operational costs.

The hospital anticipates annual electrical cost savings of $250,000 on reductions in energy use of 3.1 million kilowatt hours per year and peak demand of 327 kilowatts. Also, the hospital estimates an additional annual savings of $46,500 previously spent on cooling tower chemicals and maintenance.

DP&L determined that Grandview’s improvements earned a rebate of $342,771.30.

“We are extremely pleased with the results of this upgrade,” said Jerry Renfrow, Director of Facilities for Grandview Medical Center.