The residence Les Tilleuls in Brunstatt-Didenheim, is ranked among the most energy-intensive buildings of the social lessor m2A Habitat. It was chosen to benefit from thermal rehabilitation because of its above average energy consumption and at the request of the municipality of Brunstatt-Didenheim, which wishes to take special care of the housing of its senior population. The energy efficiency work carried out will improve winter and summer comfort and reduce the loads for tenants. The homes will be connected to the m2A heat network and reach BBC level renovation.