City of Pons (France) heating network

Heat customer introduction


  • The city of Pons (France) heating network managed by Dalkia company as part of a public service delegation.
  • Network feeding the high school and student home buildings, the pool and the gym.


Principle of solar thermal integration


  • Heating of the network return – upstream to the existing boiler
  • Fossil fuel saved: Gas


Key innovation 


  • Optimization of the operation with the existing biomass boiler in order to achieve a renewable energy coverage higher than 90 %
  • Pooling of the storage tank to improve the operation of the biomass boiler in winter


Project funded by


Project key figures

June 2020

work initiation target date

1,800 m²

solar thermal collector area on trackers

500 m³

hot water storage volume

about 1,000 MWH

expected annual production

275 tons

of CO2 emission avoided per year

District heating networks, Project