Techniques, Research, Innovations for the Building and Urban

Studies & expertises

Natural ventilation

For more than 15 years, natural ventilation has been one of our research areas and we can claim a dozen operations using hygienic natural ventilation during all or part of the year. We have developed solutions for both functions of natural ventilation:

  •     Hygienic Natural Ventilation

Solution developed to replace a controlled mechanical ventilation (CMV)

  •     Natural ventilation to ensure summer comfort

Solution developed to ensure summer comfort by increasing air flow.

These techniques are adapted to the site of each operation and can be implemented on all types of buildings: residential, schools, high schools, cultural centers or offices

The French engineering of natural ventilation is very weak. TRIBU is one of the few design offices with experience in this field. On the housing project in Saint Nazaire, we developed an ATEX file. We know how to put together a Title V file when it is necessary. We can also assist a manufacturer in product research and development. Finally, TRIBU has taken a decisive part in the evolution of norms and standards by participating in the Biotech guide (ICEB/ ARENE) on ventilation, which emphasizes the insufficiency of the regulatory hygienic flow rates, and by animating the Biotech guide on passive summer comfort, which puts back in its rightful place the air velocity in the obtaining of summer comfort in non-air-conditioned buildings.

Our expertise in natural ventilation:

  •     Reliable wind data collection
  •     CFD or aeraulic modeling of wind data to take into account the topography of the site and its built environment
  •     Consideration of the impact of winds inside the building and outside
  •     Sizing and prescription of air inlets, transfer outlets, natural draft stacks, air or solar exhaust devices, control and regulation devices...
Urban overheating, urban heat island, thermal comfort of outdoor spaces

TRIBU deals with the issue of the urban heat island and summer comfort in all its development and building operations. In addition, through studies and research closely linked with operational practice, we have developed our own methodology for analyzing the issue of urban heat island and outdoor thermal comfort.

Among the missions we can propose, we characterize the microclimate and the urban heat island effect of the site, on the basis of our bioclimatic indicators, of aeraulic modelling, of sunshine and radiation studies, instrumentation of the local microclimate (weather beacons). For outdoor spaces, we characterize the comfort of the pedestrian according to a crossed approach of various parameters such as activity, radiation, winds and temperatures.

  •     Thermography, remote sensing, spatial analysis
  •     Simplified operational tools: Indigen, urban cooling indicators
  •     Measurement tools: 14 thermometer-recorders, a fixed station and a mobile multi-parameter station and infrared meters with participative approaches.
  •     Tools: Simscale
  •     Search for synergies between heritage and environmental issues

In coherence with the bioclimatic and patrimonial specificities of the existing building, we look for frugal, simple and perennial solutions adapted to the project.

  •     A global approach, beyond winter thermal performance

Our approach to renovation combines the bioclimatic qualities of the existing building with economic, social and environmental issues: thermal performance in winter, but also comfort in summer, the carbon footprint over the life cycle, the choice of materials, the quality of use and the overall cost of the project.

Our missions integrate the following expertises:

  •     Bioclimatic and technical diagnosis of the existing
  •     Optimization studies of thermal performance and summer comfort, visual comfort, air quality
  •     Choice of the adapted materials (carbon footprint, health, potential of re-use,...)