Bitcoin Mining Gets Greener as Canaan Turns Waste Heat Into Greenhouse Energy
Hardware maker Canaan is testing a novel approach to make Bitcoin mining more sustainable—by using the heat generated from mining rigs to warm greenhouses in Manitoba, Canada.
The company launched a 3 MW pilot project in partnership with Bitforest Investment, deploying liquid-cooled Avalon A1566HA-460T units to capture waste heat and recycle it for commercial agricultural operations. Over the 24-month pilot, the setup aims for 95% uptime, providing a real-world test of whether high-density computing can double as a practical heat source in cold climates, rather than releasing excess energy into the atmosphere.
Canaan estimates that roughly 90% of the electricity powering the servers can be converted into usable heat, with water temperatures exceeding 75°C. At an all-in power cost of just $0.035 per kilowatt-hour, the economics look especially appealing for energy-hungry greenhouse operations.
Turning Mining Heat Into Agricultural Energy
The heat from the mining rigs is captured through a closed-loop heat-exchange system and used to preheat intake water for the greenhouse’s electric boilers. This helps the facility cut heating costs while maintaining ideal growing conditions year-round.
The pilot will also measure heat-recovery efficiency, system stability, and operating intensity, while exploring potential savings from eliminating traditional industrial cooling towers. Bitforest’s Manitoba greenhouse grows tomatoes year-round, making a consistent heat supply critical during harsh Canadian winters.
If successful, this model could serve as a blueprint for other dual-purpose mining-and-agriculture projects across Canada and similar cold-climate regions.
Institutional Pressure Drives Greener Mining
The push for sustainable Bitcoin mining is also being driven by institutional demand. Investor Kevin O’Leary told Cryptonews that major buyers increasingly insist on coins mined sustainably.
“When a coin is created from surplus electricity, as in Bitzero’s Norway site, it captures the value of that energy in perpetuity,” O’Leary said, highlighting how mining can improve energy efficiency across computing infrastructure.
Independent research backs this view. Analyst Daniel Batten’s report, Common Bitcoin Energy Misconceptions, draws on peer-reviewed studies and real-world grid data to show that Bitcoin mining does not inherently strain electricity grids and can actually help stabilize them, especially on networks integrating large amounts of variable renewable energy.
Duke University researchers also found that controllable mining loads can balance grids and delay costly infrastructure upgrades, making mining an unexpectedly useful tool for modern electricity systems.
Renewable Energy Now Powers the Majority of Bitcoin Mining
Sustainability in mining is also evident in its energy mix. According to Cambridge University’s research, over 52% of Bitcoin’s electricity now comes from renewables, up from 37% in 2022. This includes 42.6% hydro, solar, and wind plus 9.8% nuclear.
Natural gas has overtaken coal as the largest single energy source, while coal usage has fallen dramatically from 36.6% to 8.9%—one of the fastest industrial shifts away from fossil fuels in recent history.
The change reflects miners’ move toward cheaper, off-grid, and cleaner energy, signaling a major reduction in the industry’s carbon footprint.
Canaan’s Manitoba pilot shows a glimpse of Bitcoin mining’s greener future, where the heat from digital currency networks could power greenhouses, stabilize grids, and make cryptocurrency production more sustainable—all while keeping coins flowing and farms warm in winter.
