North Shore School District 112, located in the northern suburbs of Chicago, implemented the first dynamic closed loop (DCL) geothermal system in the U.S.

The project was installed by Trane® — by Trane Technologies and demonstrates how schools can use sustainable and efficient energy solutions.

Unlike traditional geothermal systems, DCL technology harnesses the superior heat transfer properties of flowing water, requiring significantly less physical space and making it ideal for suburban school settings. The DCL system offers a space-saving energy capture field that reduces environmental disruption, aligning with modern sustainability goals.

Faced with aging infrastructure, North Shore School District 112 sought innovative solutions that would address immediate needs and serve generations of students in the future. With strong community support and a successful public referendum, the district collaborated with Trane to explore the potential of geothermal energy.

“The inspiration for green energy and saving taxpayer dollars was at the heart of our project,” said Dr. Michael Lubelfeld, Superintendent, North Shore School District 112, in a statement. “Trane’s implementation of the DCL technology aligns perfectly with our strategic agenda and core values of sustaining both education and the environment.”

The innovative approach of the project, combined with the use of federal, state, and local incentives, made the DCL system a financially viable option for the school district. North Shore School District 112 realized over $3 million in savings on a $6.67 million HVAC investment, a return of as much as 50%.

The DCL system is expected to reduce the district’s carbon footprint by approximately 30% while providing more consistent and comfortable learning environments.