Which strategy is effective for improving indoor air quality in buildings?

Improving indoor air quality (IAQ) in buildings is crucial for the health and comfort of occupants. One of the most effective strategies for achieving this is through increased ventilation and air filtration.

By enhancing ventilation, stale indoor air is replaced with fresh outdoor air, which helps to dilute indoor pollutants, such as volatile organic compounds (VOCs), dust, and particulate matter. Proper ventilation also helps to manage humidity levels, reducing the risk of mold growth and promoting a healthier environment.

In addition, implementing effective air filtration systems captures pollutants before they circulate within the indoor environment. High-efficiency particulate air (HEPA) filters, for example, can significantly reduce the presence of allergens and other harmful particles in the air, leading to a cleaner and safer atmosphere for building occupants.

In contrast, reducing indoor temperature alone may not address the sources of indoor air pollution and could potentially lead to discomfort. Installing closed windows restricts airflow and can trap pollutants inside, worsening air quality. Decreasing the use of HVAC systems may minimize energy costs, but it can also limit necessary airflow and temperature regulation, further compromising indoor air quality. Therefore, increasing ventilation and air filtration is the most comprehensive approach to improve IAQ effectively.