Contractor

Name : City of Chauconin-Neufmontiers

Contact : Michel BACHMANN, mayor of the city

Construction Manager

Name : B&N Architectes

Contact : Cyprien LEGER - Olivier NEYRAUD

Stakeholders

Function : Other consultancy agency

Qualiconsult
Mr. Goudenege Sébastien
control and security office

Function : Thermal consultancy agency

Atelux
Mr. Bourdonnais
Thermal and fluid batch design and control

Function : Other consultancy agency

Score 2D
Mr. Sabard

Function : Other consultancy agency

Gamba Acoustique
[email protected]
Acoustic calculations

Function : Assistance to the Contracting Authority

Terre et Toits
M. Bouchet
technical delegation

Contracting method

Separate batches

Energy consumption

• Primary energy need : 53,50 kWhpe/m².year
• Primary energy need for standard building : 110,00 kWhpe/m².year

Calculation method : RT 2012

Breakdown for energy consumption : CEP:
- heating: 32.40 kWh EP is 60% of Cep spe
- cooling: 0.00 kWh EP is 0% of Cep spe
- ECS: 8.20 kWh EP is 15% of Cep spe
- Auxiliary Ch / Raf / ECS: 0.90 kWh EP is 1% of Cep spe
- Ventilation auxiliaries: 1.30 kWh EP or 2% of Cep spe
- Cep lighting: 10.60 kWh EP is 19% of Cep spe
- Electricity generation: 0.00 kWh EP
* Cep spe: Cep on which the possible electrical production of the project has not been subtracted

Envelope performance

• Envelope U-Value : 0,53 W.m^-2.K^-1
More information :

The envelope consists mainly of wood materials: frame and wooden cladding. Gantry structure with glued laminated beam. The exterior joinery is made of wood.

Good energy management has been favored, the architectural design optimizes energy consumption:
-By the elimination of thermal bridges,
-The ability of the building envelope to reduce heating requirements, including a very good airtightness and very good insulation from the outside.
-The building's ability to reduce lighting needs by optimizing the natural lighting of the teaching premises, of course, but also by paying particular attention to providing the maximum amount of natural light in the traffic and equipping the building efficient and economical electrical equipment.
-By optimizing heating and ventilation systems: high efficiency condensing gas boiler and double flow ventilation

Indicator : EN 13829 - q50 » (en m3/h.m3)

• Air Tightness Value : 0,76

More information

The Cep of this building complies with the decree of 26/10/2010 and 28/12/2012
Cep: 53.50 kWh EP
Cep Max: 110.00 kWh EP
Cep Gain: 51.4%

Systems

Heating system :
• Condensing gas boiler
Hot water system :
• Boiler fuel
Cooling system :
• Urban network
Ventilation system :
• Double flow heat exchanger
Renewable systems :
• No renewable energy systems
Solutions enhancing nature free gains :

The project is designed to avoid any unpleasant physical sensation: The winter comfort will be ensured by heating optimization and ventilation systems. It is also enhanced by the heat contribution linked to the glass surfaces of the school's South facade

Product

Cruard Charpente

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Oak core, 21/145 mm section


Apart from an "envelope" eliminating any thermal bridge, the architectural concept is a "prefabricated all-wood concept" that favors a great usage flexibility.

Construction and exploitation costs

• Total cost of the building : 3 242 000 €

Biodiversity approach

Urban environment : Chauconin -Neufmontiers, is a village of Seine-et-Marne departement, west of Meaux and 45 km east of Paris. The town located 10 minutes from the Meaux station is served by the line 777 of the "Couriers de l'Ile de France" bus. This extension of the school group is organized around a plan which is articulated on the edge of the town, opened on the new district of Prés Bourdeau. The main exit of the building leads north to the center of the village.

Life Cycle Analysis

Eco-design material : The construction mainly favors wooden materials: a wooden frame, a wooden envelope, a vegetal terrace.


• Using wood as the main material of the extension
• Maximum use of biobased materials.
The architect sought to choose bio-based materials, and to facilitate future deconstruction or change of use by the use of beam posts in a timber frame and facade building. The insulation is a bio-based hemp. For this material, the local sector has been favored, Seine-et-Marne being a producer. All doublings, partitions, false ceilings, are easily removable and recyclable to respond to subsequent educational developments. Natural lighting is naturally enhanced: central area directly lit, deep classes without windows lit with borrowed light , large glazed areas for common premises. As the school is HQE labeled, it is coherent to continue this approach and to use for maintenance eco-labeled products which respect, on the one hand the environment and on the other hand the users' and staff's health. The constructive and technical choices anticipated the maintenance and cleaning procedures of the various materials used to ensure the sustainability of the performance of the heating, ventilation, lighting and water management systems. This instruction is detailed in a user's booklet and a maintenance booklet for staff and users of the school.

Water management

In addition to the recommendation of water-saving solutions adapted to the different uses, particular care is given to the infiltration and the retention of rain water thanks to the realization of a green roof and the infiltration of rain water in the basins provided for this purpose around the playground.
An entry forecourt (to the north) also has a porous asphalt that allows the infiltration of rainwater.
A rainwater collection tank is used for watering and maintenance of spaces.

Indoor Air quality

The project is designed to avoid any unpleasant physical sensation:


• The comfort of winter will be ensured by the optimization of the heating and ventilation systems, with the contribution of heat related to the glazed surfaces of the school's south facade.
• Summer comfort will be ensured on the south facade by the wide roof overhang, completed by wooden sunshade blades. 

In the summer, the natural ventilation at night allows the cooling of the premises, an adiabatic cooling unit provides refreshment during the day.

Comfort

Health & comfort : The playground is protected and framed by the school catering building and the school building. Its shape allows great versatility of use. A bicycle shelter with cloakroom and showers will favor the use of bicycles, an aerial parking includes 6 electric vehicles stations, that is to say almost 30% of parking spaces. Exposed façades will be protected by external blinds.


• As part of the certification, identification of the sources of electromagnetic emission, carried out by an independent consultancy agency according to the standard NF EN 50499: the project does not present any equipment which would involve carrying out a complementary risk analysis
• Lighting management on clock guaranteeing safety and energy saving + arrangements made so that the lighting ensuring the signage of the site does not cause nocturnal visual disturbances for residents 

This project is part of an "eco-quartier" construction project. A new forecourt leads to the entrance porch-canopy, it can accommodate children and parents, it also allows to park bicycles. The situation of the master-nursery room allows a surveillance of the entrances and exits, of the room multi-motricity and the playground.

Acoustic comfort : Acoustic  measurements to achieve target 9 "acoustic comfort" of the certification, according to the NFS-31 057 standard for checking the acoustic qualities of the building. Achieved level of performance:



• Airborne sound insulation between premises: HIGH PERFORMING
  
• Noise impact level between premises: HIGH PERFORMING
  
• External noise insulation: VERY HIGH PERFORMING
  
• Noise level of technical equipment: HIGH PERFORMING
  
• Internal Acoustics: PREREQUISITE

GHG emissions

• Building lifetime : 50,00 year(s)