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This innovative heating and cooling method uses naturally abundant sources to cool and heat large networks of buildings in the inner city.

Genilac is a 100% renewable innovative thermal solution, using lake water to cool and heat buildings in the centre of Geneva, Switzerland.

Cold water is pumped from the bottom of the lake into a network of pipes and buildings. The water runs through the interior of buildings to cool them down during summer, removing the need for AC units in places like office buildings and data storage facilities.



In winter a heat pump heats the water before it enters buildings, using the lake water to heat buildings. This solution offers an 80% reduction in CO2 emissions for heating and cooling in comparison to traditional methods.

In summer, 80% less energy is needed for the cooling process.

See their youtube video


Genilac youtube channel:

Genilac website (all information is taken from here)

Truchet, Thierry. “GENILAC: A Major, Sustainable Energy Innovation for Geneva.”, 17 June 2021,


Endless source, closed loop cycle

80% less CO2 emissions

Project Gallery

Lake in winter


Geneva, Switzerland



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No jobs or internships are posted on their site. A survey conducted by LinkedIn found that up to 85% of jobs are filled not through online ads, but through networking
We strongly advice you to reach out to the company and show your interest and desire to learn more about them. At a minimum, you will gain a new connection!

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