AR ARCHITECTES is proud to support Eau de Paris, as the project owner, in the transformation of workshop spaces into heated office areas within the drinking water treatment plant in Longueville (France), as part of a bioclimatic and High Environmental Quality (HQE) approach.

The building’s energy performance is achieved through the full replacement of all glazed joinery. Summer comfort is ensured by Venetian blinds integrated within the glazing units. Only the roof and floor slabs are insulated, as the external walls present satisfactory thermal conductivity performance. Primary energy is provided by an air-to-water heat pump system, low-energy LED lighting, a double-flow mechanical ventilation system, and thermodynamic hot water tanks.

In addition, the operational building project is complemented by the eco-design of the car park, incorporating a photovoltaic canopy generating approximately 115 MWh/year. The electricity produced is self-consumed on site, enabling a reduction in energy consumption from 307,497 kWhEF/year to 136,118 kWhEF/year.

This project is designed within a circular economy approach, integrating low-impact buildings and site developments as part of an energy sobriety strategy, highlighting AR ARCHITECTES’ expertise alongside its partners EUROELEC SMART ENERGY and BOST INGENIERIE, and in collaboration with public stakeholders.