Bitcoin mining hardware is now supplying useful heat to roughly 2,800 homes in the Nordic region, according to Canaan, after an approximately 8-megawatt district-heating installation using the company’s hydro-cooled Avalon A1566HA miners reached full operation.
The project turns a basic property of computing into infrastructure: nearly all of the electricity consumed by mining equipment eventually becomes heat. Instead of exhausting that heat outdoors, the installation captures it in water and sends it into an existing district-heating network.
Mining Servers Produce About 80°C Water
Canaan says its A1566HA hydro-cooled systems can produce hot water at approximately 80°C, or 176°F. That temperature allows the recovered heat to feed directly into the customer’s heating network rather than being treated only as waste that must be removed from the data center.
The deployment began with about 2 MW of capacity and 228 miners. After that phase entered operation, the customer ordered another 692 units representing approximately 6 MW. Canaan now says the full roughly 8 MW installation is online and its recovered heat is reaching about 2,800 homes.
Why Hydro Cooling Changes the Equation
Air-cooled Bitcoin mines typically move heat away from ASICs with large volumes of airflow. Hydro cooling transfers heat into a liquid loop instead. That makes the thermal output easier to collect and move to another useful load, including building or municipal heating.
The economics still depend on electricity prices, Bitcoin mining revenue, construction costs and the value a heating customer assigns to recovered thermal energy. Canaan’s claims about the completed project’s performance are company-reported, although the earlier deployment and expansion were also documented in a U.S. securities filing and independent data-center industry coverage.
From Industrial Heating to Home Miners
Canaan highlighted the project at the BTCHEL conference in Helsinki alongside smaller mining-and-heating products. Its Avalon Nano 3S is rated at 6 TH/s with a maximum 140-watt draw, while the Avalon Mini 3 combines 37.5 TH/s of computing with up to 800 watts of heating output. The larger AvalonQ is rated at 90 TH/s.
The Nordic project is the more consequential test. At an 8 MW scale, heat reuse moves beyond a desktop-miner novelty and becomes part of the same infrastructure used to heat thousands of residences.
Bitcoin Mining Becomes Part of the Heating Plant
For mining operators, useful heat can potentially create a second use for energy that would otherwise leave the facility as waste heat. For heating networks, compute equipment can become a controllable thermal source. Whether that model expands will depend on local energy markets, heat demand and the ability to place computing close enough to existing heating infrastructure.
Sources: Canaan, SEC filing, and Data Center Dynamics.
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