Projects

City of Montigny-lès-Cormeilles

33 municipal buildings, one single intelligence

-20

CO₂ and energy savings

33 diverse buildings

(schools, town hall, sports complexes, etc.)

Background

The City of Montigny-lès-Cormeilles (95) has taken a proactive approach to modernising the energy performance of its building portfolio. Its estate totals 51,600 m² across 33 buildings with a variety of uses (schools, town hall, community centres, sports complexes, association and cultural buildings, etc.), managed by a single maintenance contractor. Faced with non-compliance with the BACS and Tertiary Decrees, the local authority wanted to acquire a smart energy management system to improve the overall performance of its buildings.

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-20

CO₂

51 600m

Challenges

The local authority faced several major issues:

Regulatory non-compliance (BACS and Tertiary Decrees)
Overconsumption due to performance drift not detected early
Scattered and unreliable energy data
Budget constraints requiring a financed solution
The need to work closely with the incumbent maintenance contractor
A wish to retain full ownership of its energy data

Solutions and objectives

Accenta deployed a tailored smart control solution to meet these challenges:

Installation of a class B BMS in the 13 most energy-intensive buildings
Deployment of hypervision software to monitor consumption across the entire portfolio from a centralised platform
Implementation of smart alerts for the maintenance contractor to quickly identify malfunctions
Regular digital inspection rounds carried out by Accenta’s Energy Manager teams, in addition to the maintenance contractor’s interventions
Secure contractual arrangement, via an 8-year co-contracting agreement with ENGIE Solutions, ensuring lasting alignment between all stakeholders
Full financing of the project by Accenta, for implementation with no impact on the local authority’s budget

Expected results:

Compliance with regulatory obligations (BACS Decree),
A measured reduction in energy consumption and CO₂ emissions ranging from 13% to 34% depending on the building,
Long-term improvement in comfort, responsiveness and energy performance.

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