- Building Type : Collective housing < 50m
- Construction Year : 1975
- Delivery year : 2019
- Address 1 - street : Route de Galice 13100 AIX EN PROVENCE, France
- Climate zone : [Csa] Interior Mediterranean - Mild with dry, hot summer.
- Net Floor Area : 56 000 m2
- Construction/refurbishment cost : 19 130 000 €
- Cost/m2 : 341.61 €/m2
Primary energy need :
(Calculation method : RT existant )
The rehabilitation operation of 10 residences belonging to Famille & Provence in the Jas de Bouffan district in Aix-en-Provence was initiated in 2011 as part of the Strategic Energy Plan of the city's social landlord.
These 733 dwellings grouped together in residences, ranging from R+4 to R+7 and built between 1974 and 1976, were in a moderately degraded state with an initial energy level of 98 kWhef/m2 SHAB per year for heating.
The operation carried out within the framework of a design-build contract integrating an energy performance commitment on the energy gains measured for heating and consumption of the common areas (ventilation and lighting) has led to an overall energy gain greater than 60% at the end of the 2 years of follow-up.
Parameters of comfort and quality of life have been favored in the overall approach of the project by developing principles of bioclimatic equity between the different dwellings (treatment of the ground floor, common floors and differentiated roofed dwellings).
In the end, the accommodations on the ground floor remain the biggest heating consumers, but they are the most comfortable in summer. The standard floors are almost passive in measured final energy, the spaces under the roof show savings of more than 75% on their heating consumption.
A very thorough follow-up of the tenants, their support and the consideration of feelings and uses, was initiated from the start of the program and densely carried out during the construction works. This monitoring has contributed to the sustainability of energy gains even during periods of confinement.
The redesigned real estate complexes, the exterior spaces reworked around an axis open to the rest of the district and conviviality gardens, contribute to a regeneration of the perceptions of the inhabitants and the residents vis-à-vis this large-scale district at the entrance of town.
Building users opinion
Strong overall appreciation confirmed by survey
If you had to do it again?
Less intrusive metrology for residents
Véronique Paul for BBSE
Assistance to the Contracting AuthorityDOMENE scop [email protected] Programming studies, assistance with competitive dialogue, monitoring of studies, construction, verification of the energy performance commitment, monitoring of comfort and consumption, BDM support
Thermal consultancy agencyTPFi Regulatory and dynamic thermal study, TCE studies, energy evaluation on metrology
CompanyBOUYGUES BATIMENT SUD EST T. Mais Metrology and management of the energy performance commitment
OthersROBERT CELAIRE CONSULTANT Architectural audit, global energy
- 49,00 kWhep/m2.an
- 80,00 kWhep/m2.an
- 154,00 kWhep/m2.an
Real final energy consumption
- 0,62 W.m-2.K-1
Monitoring of actual consumption before and after works with instrumentation of a panel of 54 dwellings over 4 heating seasons and compilation on 10 other dwellings of consumption on invoice before/after works
Reproductibility and Innovation
Other case studies
- Gwennaël Liger
- Hélène MEYER