Health House of Vern sur Seiche

Last modified by the author on 25/04/2018 - 22:50
  • Building Type : Other building
  • Construction Year : 2017
  • Delivery year : 2018
  • Address 1 - street : 2, rue François Rabelais 35770 VERN SUR SEICHE, France
  • Climate zone : [Cfc] Marine Cool Winter & summer- Mild with no dry season.

  • Net Floor Area : 970 m2
  • Construction/refurbishment cost : 1 490 000 €
  • Number of none : 25 none
  • Cost/m2 : 1536.08 €/m2

Certifications :

  • Primary energy need
    63.8 kWhep/
    (Calculation method : RT 2012 )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

A building labeled PassivHaus
The health center of Vern sur Seiche (35770) is among the winning projects ADEME "High-performance building and biobased materials" in Ille et Vilaine (35).
It was conceived by favoring the use of biobased materials and the choice to involve local companies.
The set includes 970 m2 of floor space on 3 levels and can accommodate loan of 25 health professionals.
It opened its doors to the public on February 26, 2018.

Sustainable development approach of the project owner

Building for health professionals in coordination to improve patient care. The characteristics of the construction, the materials used, the interior decoration, the indoor air management, the regulation of the lighting were chosen for a quality of reception and optimal work. In this logic, the master of work wanted an energy efficient building, environmental eco, biobased and obtaining the Passiv Haus Labeling.

Architectural description

Local business jobs

Bio-sourced materials, from the recycling streamProduction of materials near the site

Building users opinion

Very satisfied with the comfort, the quality of the materials, the soundproofing of the places ...
It's a total satisfaction

If you had to do it again?

We would do the same thing

See more details about this project


Construction Manager


Contracting method

Maximum Guaranteed Price

Energy consumption

  • 63,80 kWhep/
  • 143,00 kWhep/
  • RT 2012

    direct electric heating: 9.1 kWhEF / m² / year Auxiliary: 4 kWhEF / m² / year Overnight ventilation in summer: 4.4 kWhEF / m² / year ECS 5.7 kWhEF / m² / year Specific electricity (computers, lighting ...): 18 kWhEF / m² / year

Real final energy consumption

    41,40 kWhef/

Envelope performance

  • 0,28 W.m-2.K-1
  • very strong thermal insulation with biosourced materials (Thermibloc, wood wool insulation) + inertia with system isolated from the outside
    Mixed indoor, Foam Glass in under basement, Cork in under basement, Misapor under slab

  • 0,34
  • n50

  • 0,41
  • very positive: external BSO controlled by facade according to the sun, no overheating, very good brightness, in the morning all the BSO are opened automatically before the arrival of the occupants. Use of natural light in addition to artificial light, brightness controlled by the presence detection system and light sensors.

More information

The calculated performances are given on the basis of the PHPP calculation which is rather pessimistic, the first real consumptions are below these calculations.


    • Radiant ceiling
    • Individual electric boiler
    • No cooling system
    • Double flow heat exchanger
    • Solar photovoltaic
  • 30,00 %
  •  Puissance 3 KWC

    AIRXPERT system type ROTOBOX RTV 3400-T160ST-P16-AEA-SDB (high efficiency)
    flow rate of blowing / recovery Nominal 2975m3 / h
    rated temperature output: 91%

    Free cooling function, over-ventilation at night in the summer, guaranteeing a temperature between 20 and 25 ° C max in summer

Urban environment

  • 650,00 m2
  • 50,00 %
  • 162,00
  • Peri-urban site in medium-sized city, near a cultural, sports and radiology department.

    Large green spaces with species like: Prunus, rhododendron, Camellia, Hydrangea and Agapantes Africanus as well as grasses on mulch.




    Algo 15, rue de la Motte 35770 Vern sur Seiche

    Second œuvre / Peinture, revêtements muraux

    Painting based on seaweed, Breton manufacturing, which contributes to the quality of indoor air in our premises. Respect for the environment, promotes the short circuit by integrating raw materials from local and renewable resources. This product has a very low carbon footprint
    Made in local (Breton algae and manufacturing plant VERN SUR SEICHE)

    It is an extraordinary painting in any respect (application, smell, resistance, washable, rendering, colors ...)

     Se rendre sur Instagram maisonsantevern



    XELIS GROUPE, ZA Piquet Sud Est 35 370 ETRELLES

    Gros œuvre / Structure, maçonnerie, façade

    Thermibloc, formwork block made of mineralized wood fibers, incorporating insulation on the outside,
    The insulation used is the wood wool on 16 cm thick, this complex (thermibloc with wood wool) was set up for the first time at the health house of Vern sur Seiche (Voier additional information about the product )

    The insulation placed outside ensures a continuous mantle wall without thermal bridge
    The concrete load-bearing wall of floors brings the benefit of a strong inertia, thus an excellent phase shift and limitation of temperature variations
    Wood concrete highly permeable to water vapor participates in hygrometric regulation, it contributes by its acoustic absorption to attenuate the acoustic waves and thus creates a soothing interior atmosphere
    This material is perfect for a passivhaus health home

Construction and exploitation costs

  • 10 800
  • 1 490 000
  • 98 000

Energy bill

  • 5 000,00

Water management

  • 10,00 m3
  • Optimization of water consumption by automatic electronic valves.
    Minimum water consumption by the flow and the right amount needed.

Indoor Air quality

    The use of paint with a very low emissivity level (Algo), the installation of a very high efficiency CTA, lime renders, the use of Métisse (recycled cotton) insulation and Fermacel ensure the hygrometric regulation of the building.

    The set contributes to the indoor air quality of our premises .In the meeting room, CO2 detector that controls an air flow control damper.


    VOC (volatile organic compounds) is less than 1g / liter or 10 times less than the minimum allowed by the A + standard.

    The Métisse cotton wool provides exceptional acoustic comfort The triple glazing freed us from the cold zone and limits air movement.

    Inner summer temperature between 20 and 25 ° C, indoor winter temperature between 20 and 22 ° C

    Room-by-room regulation of the temperature by ceiling radiating slabs, setpoint temperature adjustable in each room.

    The mixed race (recycled cotton wool LE RELAIS) brings exceptional acoustic comfort.

    Fibralith false ceilings (ORGANIC PURE brand KNAUF based on cement-coated wood fiber, forming an acoustic wave-absorbing surface) contributes to the acoustic and visual comfort of circulations and waiting rooms.

GHG emissions

  • 1,50 KgCO2/m2/an

Life Cycle Analysis

    Thermibloc (wood / concrete mix) + wood fiber insulationSheet insulation insulation and lining (recycled cotton wool by LE RELAIS) Insulation of the floor of the DRC floor in MISAPOR (recycled glass block) instead of polystyrenePALGO 98% plant on the ground set of wall and lining plate, made of gypsum and wood fiberIndustrial wall lining of natural hydraulic lime and white cement brand PRB 100Floor ceiling tiles of clearances and waiting rooms in ORGANIC PURE brand KNAUF spiced wood wool, mineralized and coated with cement binder and white lime, offering a very good acoustic performance

Reasons for participating in the competition(s)

  • An innovative building labeled PassivHaus.Label on the level of energy performance of the building. This one takes into account all the uses: lighting, equipment, heating, ventilation, waterproofing, etc ...
  • An innovative and sustainable health home. This building of 970 m2 floor on 3 levels, is located at the entrance of the city. The entire internal organization is thought around the patient to welcome him in the best conditions.
  • A building awarded the call for ADEME Projects in Ille et Vilaine in 2016 "High-performance buildings and bio-sourced materials".
  • A controlled budget envelope

Building candidate in the category

Santé & Confort

Santé & Confort

Coup de Cœur des Internautes

Coup de Cœur des Internautes

Prix des Etudiants

Prix des Etudiants

Green Solutions Awards 2018 - Bâtiments

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Author of the page
Frédéric BEUNEUX

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Green Solutions Awards 2018 - Bâtiments