This article draws on an interview with West Chester University’s sustainability director, Dr. Bradley Flamm, who discussed the development, scale, and long-term impact of the university’s geo-exchange heating and cooling system.
Longevity over novelty
Heating and cooling remain among the most difficult parts of building decarbonization, particularly for institutions operating large campuses with aging infrastructure. Although geothermal heating is often discussed as an emerging solution, some universities in the United States have been using the technology for years.
At West Chester University in Pennsylvania, a geo-exchange heating and cooling system has been planned and expanded since the early 2000s. What began as an infrastructure decision now spans multiple academic and residential buildings, replacing fossil-fuel-based heating with an underground network designed to operate for decades.
A project years in the making
Unlike many recent campus sustainability initiatives, West Chester University’s geo-exchange system was not launched in response to short-term climate targets or a single funding program. Planning and early installations date back to the early 2000s, with major system deployment taking place between 2005 and 2009. Since then, the system has expanded as additional buildings were added or renovated and new borefields were developed.
The decision to pursue geo-exchange predated many comparable campus projects. The system was already under development when the 2008 financial crisis reshaped capital planning across higher education, and federal recovery funding helped support continued expansion at a moment when many institutions were delaying infrastructure investments.
Rather than converting the campus all at once, the university built the system in phases. District-scale geo-exchange loops were introduced alongside building-level systems, allowing geothermal heating and cooling to be integrated gradually as capital projects moved forward. That incremental approach reduced disruption and allowed the system to grow alongside the campus itself.
How the system works
West Chester University’s geo-exchange system relies on ground-source heat pumps, which use the relatively stable temperatures below the surface to provide heating and cooling. Instead of producing heat through combustion, the system moves thermal energy between buildings and the ground through a network of closed-loop vertical boreholes.
Most of the boreholes extend to depths of around 150 meters, where ground temperatures fluctuate far less than surface air over the course of the year. A water-based fluid circulates through the underground loops, absorbing heat during colder months and releasing excess heat back into the ground during warmer periods. Heat pumps located within individual buildings then adjust that energy to meet indoor heating or cooling demand.
The system is not uniform across campus. Some buildings are connected to district-scale geo-exchange loops, while others operate on independent building-level systems. That arrangement has allowed geothermal capacity to expand over time, particularly as older buildings were renovated or new facilities were added.
University officials noted that this hybrid configuration allowed the system to expand without requiring a single, campus-wide conversion.
Scale and national context
The geo-exchange system is designed to reach roughly 16.1 megawatts of thermal capacity at full build-out. Multiple academic and residential buildings are connected through a combination of district-scale loops and building-level heat pump systems.
Only a small number of U.S. universities have pursued geothermal installations at this scale. Ball State University in Indiana operates what it describes as the largest closed-loop district geothermal system in the country, supported by more than 3,000 boreholes and built to replace a coal-fired heating plant. Princeton University has also begun deploying a large geo-exchange network as part of its campus decarbonization efforts.
West Chester University’s system is smaller than those projects, but it was proposed and built earlier. Planning began in the early 2000s, at a time when campus-scale geothermal systems were still relatively uncommon in U.S. higher education. The system has expanded incrementally since then, with additional wells and buildings added over time.
University officials describe the project as among the largest geo-exchange systems deployed in higher education, particularly for a public, mid-sized campus.
Emissions reductions and cost impacts
Public sustainability materials and planning documents from West Chester University indicate that the geo-exchange system has contributed to a substantial reduction in campus greenhouse gas emissions. The reductions are primarily tied to the displacement of fuel oil and natural gas previously used for space heating. Estimates place the overall decline in campus emissions at roughly one-third compared with pre-installation levels, though the figures vary by year and by the number of buildings connected at a given time.
The university also emphasized the importance of measuring emissions on a per-capita basis. While overall campus emissions have fallen by roughly one-third, enrollment has grown by about 20 percent over the same period. Adjusted for population growth, the sustainability office estimates that per-capita emissions reductions approach 50 percent, a level officials say is uncommon among large public universities.
The system has also changed how the university approaches energy costs. By relying on electricity to move thermal energy rather than combusting fuel to generate heat, the geo-exchange network reduces exposure to fossil fuel price fluctuations. WCU has reported annual energy cost savings exceeding one million dollars, driven by lower fuel consumption and the long operational lifespan of the underground borefield.
While surface-level equipment, such as heat pumps and controls, requires periodic replacement, the underground components are designed to remain in service for decades. That long service life allows capital costs to be spread over time, an important consideration for public institutions managing large building portfolios.
Why a public university matters
West Chester University’s geo-exchange system is notable in part because of the type of institution that built it. As a public, mid-sized university, WCU operates under constraints common across much of U.S. higher education, including aging buildings, limited capital budgets, and long planning timelines tied to state funding and enrollment.
University officials noted that the project required sustained coordination across facilities management, finance, and sustainability teams. One of the main challenges was justifying early replacement of functional legacy systems, even when long-term emissions and cost benefits were clear.
Many campus buildings were constructed before modern energy efficiency standards were introduced. Rather than attempting a full conversion at once, the university integrated geothermal heating and cooling as buildings were renovated or replaced. That approach allowed the system to expand alongside routine capital projects, limiting disruption and spreading costs over time.
This context matters when comparing WCU’s system to geothermal projects at private research universities or newly built campuses. The university’s experience suggests that large geo-exchange systems can be deployed incrementally within existing campuses, even under public-sector constraints.
Planning for the long term
From the beginning, West Chester University’s geo-exchange system was designed to expand over time. As buildings were added, renovated, or connected to district loops, geothermal capacity increased alongside the campus.
The university acknowledged that it did not meet its original 2025 carbon neutrality target and is currently reassessing its long-term timeline, with 2035 under consideration. Officials emphasized that the geo-exchange system remains central to that strategy, even as timelines are adjusted to reflect technical and financial realities.
Most future changes are expected to involve surface-level equipment rather than the underground borefield. Heat pumps, controls, and mechanical systems can be upgraded as they age, while the borefield itself continues to provide a stable thermal resource.
Because heating and cooling loads are already served through electric heat pumps, the system also simplifies future electrification efforts. Rather than retrofitting building-level heating systems, later decarbonization can focus on the carbon intensity of the electricity supply.
Broader relevance beyond campus
Although West Chester University’s geo-exchange system was developed for a specific campus, the conditions it addresses are common across both the United States and Europe. Heating and cooling account for a significant share of building-related emissions, particularly in structures built before modern efficiency standards became widespread.
Many of these buildings face similar constraints, including limited space for new mechanical equipment, long replacement cycles, and continued reliance on gas or fuel oil for space heating. District-scale geo-exchange systems offer one way to reduce on-site combustion while allowing buildings with different ages and uses to connect gradually.
The approach parallels district heating systems already in use in parts of Europe, but substitutes fossil-fuel-based heat generation with ground-source thermal exchange. In practice, the technology operates largely out of sight, providing heating and cooling without requiring changes in how buildings are used.
Based on WCU’s experience, university officials pointed to upfront capital costs as one of the main barriers to wider adoption, even when long-term benefits are clear. They also encouraged institutions beginning the decarbonization process to engage in peer-learning initiatives, such as the Association for the Advancement of Sustainability in Higher Education’s (AASHE) Decarbonization Academy, which brings universities together to share technical and planning strategies.
Much of the discussion around building decarbonization focuses on technologies that are still being planned or tested. At West Chester University, a large-scale geo-exchange system has already been in place for years, integrated into the daily operation of the campus.
Built gradually and tied to routine capital projects, the system shows how geothermal heating and cooling can function as part of long-term campus infrastructure rather than as a standalone sustainability initiative. Its impact is largely invisible above ground, but reflected in lower emissions and reduced reliance on fossil fuels.
