Imagine tapping into the Earth's heat to generate clean energy anywhere on the planet — no volcano required, no fracking involved, and no water consumed. That is the promise behind Eavor Technologies, a Calgary-based startup that just won "Overall CleanTech Innovation of the Year" at the 2026 CleanTech Breakthrough Awards.
The recognition highlights a technology that could fundamentally reshape how the world thinks about geothermal energy: the Eavor-Loop, a fully closed-loop system that circulates water deep underground to capture heat and bring it to the surface for power generation or district heating.
How It Works
Traditional geothermal energy depends on finding naturally occurring underground reservoirs of hot water or steam — which limits deployment to volcanically active regions like Iceland, New Zealand, or parts of the western United States.
Eavor's approach is radically different. The system works by drilling two vertical wells several kilometers deep, then branching off horizontally to create a network of connected tunnels. These are sealed to form a fully closed loop, isolated from the surrounding rock.
Water circulates continuously within the sealed system, absorbing heat from the deep earth and rising to the surface through a natural thermosiphon effect — hot water rises in the outlet well while cooler water descends in the inlet well. No external pump is needed. No water is consumed or resupplied.
"We are moving past the era of geothermal as a niche energy source," said Mark Fitzgerald, Eavor's President and CEO. "Our closed-loop system makes it possible to use the Earth's heat virtually anywhere, dramatically expanding the global potential for geothermal."
Already Operating at Scale
This is not a lab experiment. Eavor's first commercial-scale project is already operational in Geretsried, Germany, where it provides clean, dispatchable heat and power. The system runs 24/7 regardless of weather, unlike solar and wind, making it a potential backbone for reliable clean energy grids.
The technology is being explored for applications ranging from municipal district heating to energy-intensive infrastructure like data centers, which are driving surging global electricity demand.
No Fracking, No Earthquakes
One of Eavor's key advantages over other geothermal approaches is what it avoids. Enhanced geothermal systems, another emerging technology, use hydraulic fracturing to create underground reservoirs — which carries risks of induced seismicity and high water consumption.
"Eavor technology marks a breakthrough for the industry and validates closed-loop geothermal as a new class of clean, dispatchable energy," said Bryan Vaughn, Managing Director of CleanTech Breakthrough. "Eavor mitigates the issues of fracking and geological limitations for deployment."
A Growing Global Footprint
The CleanTech Breakthrough Awards attracted thousands of nominations from companies across more than 16 countries, reflecting the rapid global growth in clean energy innovation. Eavor has attracted equity investments from leading global energy producers and is expanding its technology to new sites.
As the world races to decarbonize while meeting surging energy demand — driven in part by AI and data infrastructure — technologies like Eavor's closed-loop geothermal could play an outsized role. The Earth's heat is everywhere. Now there is a way to use it.
