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While wasted heat represents four times the global solar energy production, the French cloud company Tresorio recycles the heat emitted by its servers to heat buildings’ water. Created in 2016, this technology targets both companies and individuals.
How does it work? Water passes through copper blocks in contact with computer chips. This water comes out hot and is reused in boilers. By recycling this energy, Tresorio aims to make digital technology more inclusive and useful in daily life. Jonathan Klein, co-founder of Tresorio, explains: “If we recycled all the heat from French data centers, we could supply the equivalent of 4 billion showers per year, or 6 months of showers for the French population“.
An ingenious service praised by Les Grandes Idées!
While buying a hotel is not within everyone’s reach, various forms of collective ownership allow dedicating part of one’s savings to the hotel sector.
Jean-Marc Palhon, Chairman of EXTENDAM, specifies: “Hospitality is a full-fledged asset class in which it is possible to invest. The European territory lends itself well with an abundant active population and a dense transport infrastructure. It is also the most visited continent in the world. At the same time, the hotel industry suffers from a supply deficit and an aging stock, quite unsuitable for demand“.

On May 23rd and 24th, Marseille hosted the 15th edition of the National Meetings of Citizen Energy, a key event organized by Énergie Partagée with the support of ADEME and the City of Marseille. The edition was a success with more than 180 participants from all regions of France.
At the heart of the discussions: the crucial role of citizen projects in the energy shift. From relocalizing energy production to territorial cooperation, citizen initiatives are essential for shaping a sustainable and inclusive energy future. Public workshops sparked great interest, demonstrating enthusiasm for innovative and accessible energy solutions.
Erwan Boumard, CEO of Énergie Partagée, emphasizes: “This edition confirms the growing commitment of citizens, local authorities, and financial actors in our energy transition!”