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Poor Indoor Air and Ventilation

Most buildings are ventilated by opening of windows.


This is an inefficient approach with numerous faults, often leading to poor indoor air quality.


Most of the time natural ventilation isn't working properly, as the windows are often kept closed.  This causes the indoor air to become stale, and contributes to humidity build up.  During cold weather, droplets start forming on the inside of the window glass, and if the problem is persistent, mold may appear, leading to poor indoor air quality.  As time passes, the humidity may even reach inside the window glass, and cause the view to become foggy, while gradually damaging or even ruining the window itself.

We often have little control over indoor climate if we use open windows to ventilate. It may become chilly, and uncomfortable.  The entire day may become a struggle between finding the right balance between a cool temperature and stuffy air.

Open windows can often make the outside traffic noise become louder and various outdoor pollutants may enter the building.  This may typically be traffic pollution, dust and particles like pollens or insects.  Not only does this cause annoyance for inhabitants, but this can also seriously affect their health and quality of life 

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