What system is commonly implemented to improve indoor air quality in buildings?

The mechanical ventilation system is commonly implemented to improve indoor air quality in buildings due to its ability to control the introduction and circulation of fresh air throughout the space. This system utilizes fans and ductwork to actively bring in outdoor air, filter it, and distribute it within the indoor environment. By doing so, it can effectively reduce pollutants, excess moisture, and stale air, creating a healthier indoor atmosphere.

Mechanical ventilation systems often include specific components such as air filters, heat exchangers, and sometimes even humidity controls, which help ensure that the air quality adheres to health and safety standards. Additionally, they enable precise management of airflow rates, which is essential for maintaining comfort levels and ensuring energy efficiency.

In comparison, natural, passive, and hybrid ventilation systems rely more heavily on environmental conditions and the building's design to facilitate airflow. While these can support improved air quality, they may not be as effective in all situations, particularly during times when outdoor conditions are not optimal or when specific air quality concerns need to be addressed with precision.