Choose your system > Passive stack ventilation

Collective treatment for apartments

In individual housing as in apartments, the passive stack ventilation exploits the natural motors (wind and thermal draught) in order to renew the air within the dwellings. These " motors " create a pressure in the ventilation duct (3) that involves an air circulation inside the dwelling towards outside (through the ventilation duct). The polluted air requires its replacement by new air to be evacuated: this one is admitted by humidity sensitive air inlets (1) located above windows, in habitable rooms (bedrooms and living room).

The air is then evacuated through wet rooms (toilets, bathroom, kitchen) through extract grilles (2): this principle is called "sweeping". Depending upon natural motors, wind and thermal draught, the passive stack ventilation may be random: it is therefore necessary to control it. The humidity sensitive process, whilst measuring the humidity rate in order to determine the necessary airflow, gives an adapted answer to the variability of the natural motors. In addition to its energy saving (no fan) the first qualities of this ventilation technique are acoustics (low air speeds) and simplicity of maintenance.