By Le Figaro with AFP
Published
12 hours ago,
Updated 8 hours ago
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Built in the Confluence district, Nexity’s “Essentiel 22-26” building will use human heat and household appliances to heat during the winter.
Le Figaro Lyon
A residential building project, capable of maintaining a comfortable indoor temperature without the aid of radiators or air conditioners, will be completed in 2026 in Lyon, for the “first” times in France, its initiators announced on Thursday. Built in the south of the city, in the developing district of Confluence, the “Essentiel 22-26” building will be “emblematic of a climate-neutral and united city”said the environmentalist president of the Lyon Metropolis, Bruno Bernard, during a presentation of the project.
Designed by Austrian architectural firm Baumschlager Eberle, the six-storey building, currently under construction, will be able to maintain an indoor temperature of between 22 and 26 degrees all year round. “without the use of a conventional heating and air conditioning system”promises the developer Nexity, which is carrying out the project.
Honeycomb bricks and triple glazing
In the cold season, the rooms are heated by “the body heat of the occupants and that given off by lighting and household appliances, for example”architect Mathias Bernhardt of the Baumschlager Eberle firm assures AFP. When it is warmer, cooling is done by natural ventilation with a shutter controlled by software that measures the temperature, humidity and air quality in the building via a network of sensors. Finally, its walls in “60 cm thick honeycomb bricks” and its windows “triple glazed” must allow for optimal thermal insulation and guarantee “inertia” the restitution of this interior temperature of around twenty degrees, according to Mathias Bernhardt.
Already tested in Austria and Switzerland since 2013, “L’Essentiel” will be part of a set of eleven buildings dedicated to housing, commerce and education, delivered between the beginning of 2026 and the end of 2027, according to Nexity. Finally, “L’Essentiel” will offer 23 apartments for purchase at moderate prices, at 3,000 euros per m2, the land remaining the property of the Foncière Solidaire du Grand Lyon within the framework of a real solidarity lease (BRS). A second building of this type is planned for 2028 in La Garenne-Colombes (Hauts-de-Seine).
