Aulnay Énergie Services

Built World

As of September 2026: Coriance subsidiary managing the heating network since 1999

A town northeast of Paris is swapping its gas-fired heating for heat pulled from 2,000 meters underground. Drilling of the geothermal doublet in Aulnay-sous-Bois is complete, and 93% of the local district heating network should run on geothermal water by the end of 2026.

Updated Sep 28