The program of the operation initially targeted the RT2012 but the Project Manager had already expressed its desire to use geothermal energy, solid wood panels (CLT) and significant thicknesses of wood fiber insulation. The thermal resistance of the building envelope was therefore already much better than what would have been expected for a building RT2012. Regulatory calculations and simulations carried out at the beginning of the projects showed that the building was close to the heating consumption of a passive building.
The project management team therefore proposed to the APHP to improve the building to achieve the performance of a passive building, which represented several advantages:
Do not use heating networks in a tertiary building however has a sore point: The building is divided into 3 areas at the CTA. The heating is provided only by a hot battery on the fresh air outlet of each zone. The heating setpoint is adapted according to the temperature measured on the air of each return network.