The building sector remains one of the toughest hurdles in the global fight against climate change. In the United States, commercial buildings generate roughly thirty percent of carbon emissions, largely because we still burn fossil fuels for heating and cooling. While solar panels and electric vehicles dominate headlines, decarbonizing the invisible infrastructure of HVAC systems is another way the battle for a sustainable future is won.
A critical piece of that solution was unlocked at the University of Minnesota and is now being brought to market by Darcy Solutions, a clean-technology startup. Born from UMN hydrogeology research and licensed through the University’s Technology Commercialization office, Darcy has spent the last five years proving that the path to a net-zero future is right beneath our feet—even in the middle of dense urban areas.
The Urban Breakthrough
Traditional geothermal heating and cooling is highly efficient but structurally constrained. Conventional systems rely on transferring heat through stagnant rock, requiring dozens or hundreds of deep boreholes spaced wide apart. This massive footprint makes geothermal virtually impossible for tight urban properties.
Darcy’s technology provides a simple solution by utilizing moving groundwater. Because water transfers thermal energy far more efficiently than solid rock, Darcy’s specialized closed-loop system requires significantly fewer boreholes. The system simply "borrows" the stable, fifty-degree subterranean temperature to heat a building in the winter and cool it in the summer, removing zero water from the aquifer and introducing no contaminants.
By tapping into groundwater flow, Darcy achieves a ninety-five percent reduction in the surface footprint required for installation. For the first time, retrofitting a downtown office building or adding clean energy to a tightly packed college campus is possible.
Walking the Talk at UMN
As a recent Star Tribune feature highlighted, higher education institutions are leading the regional transition to geothermal energy. Because universities manage campus infrastructure long-term, they are uniquely positioned to invest in climate solutions.
A premier example of this is the University of Minnesota’s Collections Facility (CF). Housing more than three million delicate archival volumes, the facility requires ongoing precise climate control to preserve decades of historical and academic archives. It also needed to meet strict institutional sustainability goals on a compact piece of land.
Traditional geothermal would have consumed the entire parcel, leaving no room for the facility itself. Instead, UMN Facilities turned to Darcy, installing a three-well, three-hundred-ton total groundwater geothermal system. Coupled with a massive rooftop solar array, the facility’s climate control system is a masterclass in modern, urban decarbonization.
“Darcy’s technology has opened up new opportunities for a more sustainable approach to mechanical design and utility operations. Notably, the system eliminated the need for natural gas in the mechanical infrastructure, directly supporting the University’s goal to phase out fossil fuel dependency,” said Trevor Dickie, University of Minnesota manager of design and construction.
With just three small holes in the ground, the University secured decades of high-efficiency, low-cost preservation. It stands as a living laboratory of how higher education institutions can leverage their own intellectual property to solve operational challenges.
From Lab Bench to Market Leader
Darcy’s trajectory from a licensed concept to an independent market leader demonstrates the power of the University’s startup accelerator pipeline. In its early stages, the company was nurtured by the University’s Venture Center and received early funding from the Discovery Capital Investment program, which helps capital-intensive startups bridge the gap between laboratory research and commercial deployment.
“It takes an enormous amount of support to bridge the gap between a successful lab experiment and a scalable industry product," said Chris Ghere, associate director of venture development in the Venture Center. "The Venture Center is one of the supporting structures that ensures that promising licensed technologies, like Darcy’s, have a firm foundation in the early stages.”
This early support was instrumental in securing Darcy's long-term success, setting up the startup for early success and eventually securing nearly $5 million in federal grants. Over the past five years, Darcy has achieved explosive commercial growth, growing its team from four founders in 2019 to a robust workforce of 50 professionals today. With more than 20 successful project installations to date, the company continues to expand its market footprint, securing a client roster that includes multiple Fortune 500 companies.
According to Robert Ed, director of marketing and strategy at Darcy Solutions, "Technology Commercialization gave us the pathway to move that idea out of the lab and toward a real product in the market. The Venture Center's support was especially critical in our earliest stage, when we were a team of just a few people trying to think through very complex requirements to find product market fit and how to get started. Darcy founders received coaching from experienced executives and entrepreneurs who helped us pressure-test our business model, understand the market and distribution, and finally think clearly about the resources the team would need to succeed.”
The Big Picture
True sustainability requires practical scalability. By eliminating the spatial and financial barriers to geothermal energy, Darcy provides a scalable blueprint for modern urban decarbonization. Darcy is continually growing in team member count, partnerships and geographic coverage. The business currently has 50 team members, up from 10 three years ago. In addition, they have secured partnerships in over 10 states and are adding another 6 in the next few months.
While the University and Darcy now operate as separate entities, the company's success underscores the real-world value of public research. Through licensed breakthroughs and foundational startup support, the University of Minnesota is doing more than preparing for the future—it is actively engineering the independent enterprises that will sustain the planet.