From Craft to Building Industry in the Aspect of Development of Ventilation Systems

Ventilation of a room can be considered from two aspects. The first one is the air flow through the envelope, the second one is the air movement inside the space1. Climatic phenomena which are involved In the process of air flow through the envelope are wind and external temperature causing pressure difference between outside and inside the building which forces air flow through the existing openings. The air movement inside the building is mostly generated by the gravitational forces of the air of different temperatures (free convection) but also by the air forced through the openings (forced convection)