Project Aarhus, Denmark

Project • Geothermal

Geothermal in Aarhus

In collaboration with district heating company Kredsløb, Innargi is bringing geothermal district heating to Aarhus, Denmark’s second largest city. The first geothermal plant opened in Skejby on 31 October 2025 and is already supplying heat to local homes. Over the coming years, two additional plants will be established, and the Skejby site will be expanded to increase capacity. By 2030, the Aarhus geothermal system will be the largest of its kind in the EU, comprising three facilities across the city.

Explore this site to find out more about the progress of the project.

Aarhus Project

Current status

Three test wells were drilled and evaluated during the exploration phase (2023–2024), confirming a strong geothermal resource in the subsurface. Based on these results, and improved technology in the project’s first year, the plan was optimised to deliver the same heat from only three locations instead of the originally planned seven.

Since October 2025, the first geothermal facility in Skejby has been supplying heat to Aarhus’ district heating network.

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Explore our Aarhus geothermal drilling sites:

Drilling commenced

Port of Aarhus

Once fully built out in 2030, the project will consist of three heating plants and be the biggest of its kind in the EU.

Skejby Heating Plant

Skejby

The first geothermal facility in Skejby began supplying heat to Aarhus' district heating network in October 2025.

Sites

Facilities

MW total capacity

In Brief

Capacity & Demand

The planned collected capacity of the geothermal heating plants in Aarhus is 110MW, equalling 20% of Aarhus’ district heating demand.

Project Timeline

If everything goes to plan, the three geothermal facilities are to be completed in 2029 with an expected operation of at least 30 years.

Environmental Impact

The annual CO2 emissions are expected to be reduced by up to 165,000 tonnes.

Innargi and Kredsløb opening the heat in Skejby, Aarhus

EU’s largest geothermal district heating plant begins operations in Aarhus, Denmark

Aarhus, Denmark, has taken a major step toward sustainable heating: the first geothermal heat is now flowing into homes from what will become the largest integrated geothermal district heating system in the European Union.

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Latest Milestone

Construction of the first geothermal heating plant has started!

The councillor, CEO of Kredsløb and Project Director of Innargi kneeled to lay the foundation stone for Aarhus’ first geothermal heating plant in Skejby. The plant will transfer heat from the geothermal reservoir to the district heating network.

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