France – District-heating mains construction work – Travaux de raccordement hydraulique de la chaudière miscanthus dans la chaufferie du RCU POITIERS BIARD

Fixed-price works contract - The project involves the installation of a multi-fuel boiler (wood chips, Class A wood, miscanthus...) with a capacity of 300 kW in the recently commissioned boiler room, which was put into service in October 2025 and supplies the Urban Heat Network of Grand Poitiers. It was designed to accommodate 2 boilers, the first of which, with a capacity of 5 MW and running solely on wood chips, is already in operation. The addition of the second boiler is therefore taking place in an operational boiler room.

This lot aims to: supply and install a set of hot water piping, valves, and equipment for connecting the new "miscanthus" boiler, the pressure decoupling heat exchanger between the RCU and the boiler (PS 3 bars and PN 6 bars), the installation (supply by Dalkia) of the primary/secondary pumps, decoupling heat exchanger, the water supply for extinguishing and cooling the boiler, the compressed air supply for the boiler. The contracting authority reserves the right to ask tenderers to present one or more mandatory variants, which will then be described in the DCE. The services may be divided into a firm section and one or more optional sections. If applicable, the sections will be described in the DCE offer phase.