RE2020 Thermal Study
Poitiers, New Aquitaine

In Poitiers, the RE2020 calculation is carried out in zone H2b, in a degraded oceanic climate where the mid-seasons are long and where the degree-hours indicator, long regarded as secondary at this latitude, is becoming a binding constraint on heavily glazed commercial buildings. The Futuroscope hub concentrates precisely this type of development, with high internal loads and dense occupancy, for which dynamic thermal simulation delivers more than the regulatory calculation alone. The university campus and the teaching hospital (CHU), for their part, follow a large-scale renovation logic, where the study serves first and foremost to rank the energy-saving opportunities.

Summer comfort is the sticking point of the RE2020 in Poitiers: on exposed façades, the degree-hours (DH) threshold is quickly exceeded, all the more so in the south of France. Dynamic thermal simulation arbitrates between thermal inertia, solar shading and natural ventilation before the building envelope is fixed.