Paris Pool Utilizes Server Heat for Temperature Regulation
The Butte-aux-Cailles pool in Paris employs a unique system that captures waste heat from servers to maintain water temperature. This initiative reflects a broader shift in energy management and urban heating in France, driven by legislation mandating heat recycling from data centers.

The Butte-aux-Cailles pool in Paris utilizes a system developed by Stimergy that recovers heat from computer servers to sustain water temperature at 27°C. This technology, operational for years, delivers 45 kW and achieves a remarkable efficiency rate of 95%, covering 10-20% of the site's energy needs.
The initiative, which has reduced CO2 emissions by 45 tons annually, serves as a model for other cities, including Nantes and Saint-Denis, that are adopting similar heat recovery systems. Legislative changes now require data centers over 1 MW to recycle waste heat, with potential outputs from AI projected to reach 13 TWh by 2035, representing significant energy savings.




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