Controlled natural ventilation.

Natural ventilation of dwellings is commonly applied, especially in mild and moderate climates. The disadvantage of natural ventilation is the poor control of both flow directions and flow rates within the ventilated building. To improve control, theuse of mechanical exhaust is often recommended. Though this may improve total ventilation, the ventilation of separate rooms often is insufficient still. Our approach was to try and find a highly controlled natural ventilation system, whose control is highly independent of weather changes and dwelling properties, just like in thermostatic temperature control. Therefore a study has been carried out, using a ventilation calculation model.