Passive ventilation systems

Ventilation is a process, by which impure air is removed from inside of a building and fresh air is delivered. Ventilation is a necessary process because the air in all rooms is constantly unpurified. Thank to the difference in temperatures, density of the air inside and outside the building, and effects of wind, the air gets into the building through passive ventilators and gets out of it through ventilation canals.
 
Obvious results of inappropriate ventilation:
-fungi on window frames, below window sills, and  in corners of rooms,
-evaporation over window panes,
-condensed steam on cool surfaces of walls and some other objects.
 
Invisible results of inappropriate ventilation:
-bad mood, fatigue, allergies, etc.,
-decay on building construction through penetration of walls by moisture.
 
The function of passive ventilation systems is to ensure the incoming of fresh air through PVC windows with simultaneous improving of its exchange in habitable, commercial, and other types of buildings.
 
Advantages of using of passive ventilators:
-appropriate inflow of fresh air into the rooms,
-uniform ventilation of the entire apartment,-limitation of the risk of getting dampness in rooms and development of fungus,
-energy saving.