It is important that you ensure a constant renewal of your indoor air. Studies have proven that the air in rooms should optimally be exchanged with fresh air six times per hour. Unfortunately, this is far less in most buildings. Especially in the Middle East, often only a recirculation of the indoor air through room air conditioners takes place with no air exchange at all.
At first sight, the most logic solution would be to open windows. However, it is not. Why? In most locations, the incoming outdoor air is polluted as well. When opening the window, you let particles inside that you’d want to avoid.
The key is thus state-of-the-art mechanical ventilation equipment that exchanges, filters, and recovers the air. Does your building have what it takes to provide a good indoor air quality?