City of Guerande and TE44 (Energy Territory 44)
The client’s objectives and expectations
The study aims to validate the technical feasibility of the project and assess the economic interest for each stakeholder.
Our main tasks
The assigned mission takes place over several phases:
- Phase 1 : Réunion de démarrage / Collecte d’informations / Visites des différents sites,
- Phase 2: Pre-diagnosis / Consumption assessment by building,
- Phase 3: Definition of scenarios (network plan) and boiler room location,
- Phase 4: Techno-economic study (sizing and investment),
- Phase 5: Final presentation.
We conducted an economic and financial analysis. Its purpose is to verify whether the heat price charged to users is lower than that of the reference fossil or electric solutions for each identified establishment. The heat sales cost includes all investments, available subsidies, as well as operating and fuel costs.

Project characteristics
- Network length: 6,876 meters,
- Number of substations: 22,
- Substation needs: 8,570 MWh/year,
- Density: 1.25 MWh,
- Wood power: 1,500 + 800 kW,
- Coverage rate: 90%,
- Payback period (with Heat Fund subsidies + Energy Savings Certificates): 1 year.