L'Isle-Adam Branch

L'Isle-Adam is a 406 m² BNP Paribas retail bank branch located in the north of Paris. The branch participated in the 2023 CUBE energy savings competition, where it achieved first place in both the overall ranking and the general performance ranking among participating buildings.

The primary driver of the branch's energy savings was a change of energy source: the original fuel oil boiler was replaced with an air-source heat pump. This shift was accompanied by operational measures including a 20°C winter setpoint, no summer cooling except at the reception area, individual switches for lighting/heating/cooling in each office, timed lighting controls, and the full shutdown of equipment (heating and air handling units) on weekends and closed days. On the engagement side, the branch was supported by BNP Paribas's centralized Green Buildings team and a dedicated internal project team that handled communication, awareness, and sharing of results. Plaids (warm blankets) were distributed to occupants on cold days.

The fuel-to-heat-pump conversion also highlighted an unexpected priority for future work: moving the heat system from under the windows to the ceiling made cold drafts from the single-glazed windows more noticeable to occupants. Replacing those windows has been identified as the next upgrade, which will further improve the building's performance.