Our history

On 25 July 2014, the EDF Group acquired 100% of Dalkia assets in France, which now represent its core business in energy services.

1937: First performance-based contract signed

On a cold winter evening in northern France, the heating systems at Villiers-Saint-Denis hospital broke down. Léon Dewailly, founder of Chauffage Service, stepped in immediately. 
The repairs were performed so quickly that the hospital's manager asked the company to sign a performance-based contract covering operation and maintenance to ensure compliance with specific temperature targets.
The hospital is still a Dalkia customer today.

1950s: Growth in district heating systems

Post-war reconstruction led to the development of multi-dwelling residential units and district heating systems. Chauffage Service's fortunes in France grew with this boom.
Montenay, a company established in 1860 primarily geared towards fuel trading, signed its first heating plant management contract with the city of Tours.

1960s: Growth and international expansion

The decade was shaped by consolidation: Chauffage Service merged with HVAC engineering company Compagnie Générale de Chauffe (CGC) and CGC expanded into the United Kingdom and Belgium.

1970s: The energy crisis

The energy crisis in Europe gave rise to new financial concerns. Montenay and Compagnie Générale de Chauffe, which had both become part of Groupe Générale des Eaux, responded to the challenge by developing geothermal energy and waste-to-energy solutions while continuing to build heating networks and constantly innovating with upgraded plants, energy transmission systems and substations.

1990s: Strong growth in Europe

In the 1990s, Compagnie Générale de Chauffe expanded into Central and Eastern Europe. CGC and Esys Montenay merged to form the Energy Services division of Groupe Générale des Eaux.

This was a time of growing awareness of global environmental challenges like the greenhouse effect and the increasing scarcity and cost of primary energy sources. In response, the Energy Services division began focusing on cogeneration and renewables.
This led to new solutions such as industrial "hard facility management" services.

In 1998, Compagnie Générale des Eaux changed its name to Vivendi. The Energy Services division became Dalkia.

2000s: An international group

Dalkia now constituted the energy services arm of Vivendi Environnement, which, in 2003, became Veolia Environnement. EDF became a shareholder following an agreement with Vivendi Environnement in December 2000.

That same year, Dalkia signed a deal to take over all EDF energy services companies (in particular, Citélum), providing a new foothold in international markets and making it the European leader in energy services in the space of just a few years.
EDF acquired all Dalkia's assets in France on 25 July 2014.

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