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Vienna starts the geothermal energy revolution: 20,000 households will be climate neutral from 2028!
The geothermal energy project "deep" in Aspern, Vienna, will start drilling in 2025 and is expected to provide climate-neutral heat for 20,000 households.
Vienna starts the geothermal energy revolution: 20,000 households will be climate neutral from 2028!
A new milestone for Vienna's energy future: The geothermal energy project “deep” by OMV and Wien Energie recently made significant progress. The drilling work in the Seestadt Aspern has been successfully completed and we can now look forward to the results of the water analysis from a depth of around 3,000 meters. This work ended in July 2025 and plans for the next phase of the facility are already taking shape. As the city of Vienna and the company have announced, the above-ground system will be built after analyzing the pumped water.
The ambitious goal? To be climate neutral by 2040. In order to get ethical environmental protection off the ground, geothermal energy is seen as a key technology. From 2028, around 20,000 households in Vienna will benefit from the new system, which will be known for its emission-free heat. For a sustainable future, the city and the companies are relying on this innovative project and are promising a thermal output of around 20 megawatts for operation.
Technology and investments
Deep geothermal energy technology uses geothermal energy from a depth of more than 300 meters. In Vienna, the “Aderklaaer Conglomerate” is formed here at a depth of 3,000 meters. The hot water at this depth can reach temperatures of up to 100 degrees Celsius and is extracted from a borehole. The temperature is used to supply heating via a heat exchanger before the cooled water is returned to the underground via a second borehole. This cycle is intended to ensure a constant heat supply in the long term.
The total volume for this promising investment is 90 million euros, and the Climate and Energy Fund and the Climate Protection Ministry are supporting the project. City councilor Ulrike Sima confirmed that the water is available and suitable for the project. Compared to other energy sources, the use of deep geothermal energy is base-load capable, renewable and climate-neutral, which leads to an increasingly important role in energy supply in both Vienna and Germany, as the Federal Ministry for Research, Technology and Space explains.
Information and outlook
For anyone interested, an information center will be opening at Seestadtstrasse 17 in 1220 Vienna from January 2025. People can find out more detailed information about the project here. The potential of this technology is high and could theoretically cover the heat supply for up to 200,000 households. The development and implementation of such projects is crucial for achieving climate goals.
What does this mean for future energy supplies? A sustainability-oriented approach will not only benefit city dwellers, but could also significantly reduce dependence on fossil fuels and thus make an enormous contribution to climate protection. The geothermal energy project in Aspern is a step in the right direction to offer the Viennese population a safe and environmentally friendly heating alternative.
Overall, it shows that geothermal energy can not only cover domestic heat needs, but also offers a great opportunity for a climate-neutral future. The “deep” project could therefore be groundbreaking for future generations.