Renovation of the Baudin school group hosting nursery and elementary classes and a school restaurant. The challenge of this rehabilitation is to reach the BBC level for an overall energy saving of around 60%. The project involves the demolition and reconstruction of part of the building. with big stakes around energy, environmental and comfort aspects.
As part of the management of its heritage, the City of Bourg-en-Bresse is engaged in an energy saving program, in partnership with the SPL (Local Public Corporation), OSER (Regional Energy Services Operator) ). The studies carried out led to the signing at the end of 2014 by the SPL of a "works and services" CPE with a guarantee of results corresponding to a 60% reduction in energy consumption (all uses). The renovated building will comply with the BBC-renovation level. an emphyteutic lease of 20 years has been signed between the city and the SPL. The amount of the work will be paid by the SPL, and the City will reimburse this amount in the form of an annual rent including the price of the work, the fees and the maintenance. More than 90% of services in this market are provided by local small and medium-sized businesses. The representative, Climsanit, is surrounded by 2 local SMEs (Sarl Juillard for thermal insulation and asbestos removal and Prodalu 01 for the replacements of joinery), as well as the design office SINTEC NEPSEN group, Bertrand Feinte (architect ) and Dalkia, for the operation of thermal equipment

Sustainable development approach of the project owner

As part of the management of its heritage, the City of Bourg-en-Bresse is engaged in an energy saving program, in partnership with the SPL (Local Public Corporation), OSER (Regional Energy Services Operator) ). At the end of 2013, the city entrusted the overall energy renovation of school groups to the SPL, including the BAUDIN school group. The studies carried out led to the signing at the end of 2014 by the SPL of a "Works and Services" CPE with a guarantee of results corresponding to a 60% reduction in energy consumption according to the buildings.

The renovated buildings comply with the BBC renovation level, with a desire from the Client to promote quality and healthy products for children and staff, as well as to improve comfort (visual, acoustic, ventilation, ... ). Environmental requirements for the materials used have been incorporated, in particular for those having an impact on the quality of the indoor air. Users were involved in the initial diagnosis during the program phase and sensitization workshops were organized with all staff. A dynamic energy simulation was performed to simulate several scenarios and treat the discomfort of winter and summer.

A 20-year long emphyteutic lease was signed between the City and the SPL. The amount of the work will be paid by the SPL, and the City will reimburse this amount in the form of an annual rent including the price of the work, the fees and the maintenance.

More than 90% of market services are provided by local small and medium-sized businesses. The representative, Climsanit is surrounded by 2 local SMEs (Sarl Juillard for thermal insulation and asbestos removal and Prodalu 01 for the replacements of joinery), as well as the Sintec design office, Bertrand Feinte (architect) and Dalkia , for the operation of thermal equipment.

Early 2016: Meetings with teachers and school officials were organized to involve building users upstream and take into account their needs and proposals.

The work started in the summer of 2015, for a period of one year (delivery scheduled for the start of the school year 2016/17).

The energy renovation operation

The operation was launched in a global market for design, implementation and maintenance operations for a period of 8 years. The performance objectives are to reduce energy consumption by 60% and to reach the BBC renovation level.

Architectural description

The school group Baudin, with a surface of 1,580 m², includes a kindergarten, a primary school and a dining room. A yard has been laid out but is not heated.

The old buildings date from the 1900s and the extension of kindergarten was put into operation in 1984.

This school group consumed before renovation more than 372 MWh per year or an energy budget of 28 000 €.

Main works carried out:

• Thermal insulation from the outside for the facades on the courtyard and from the inside for the main facade.
• Replacement of exterior joinery by high-performance wood joinery equipped with adjustable sunshades or shutters. Replacement only glazing on newer joinery.
• Installation of two condensing boilers.
• Establishment of a centralized technical management
• Installation of double flow mechanical ventilation in the refectory, the motor room and the dormitories.
• Related work: creation of an extension and a yard, relocation of the school restaurant, accessibility accessibility PMR (creation of an elevator, access ramp, ...)