Which method is effective for improving indoor air quality?

Improving indoor air quality is crucial for creating a healthy environment, and regularly changing air filters along with ensuring proper ventilation is one of the most effective methods to achieve this. Air filters play a significant role in removing particulate matter, allergens, and pollutants from the air circulating through the HVAC system. When filters are not changed regularly, they can become clogged, which reduces their effectiveness and allows harmful particles to remain in the air.

Proper ventilation is equally important as it helps to exchange stale indoor air with fresh outdoor air. This process dilutes indoor pollutants and lowers their concentration, contributing to a healthier indoor environment. Together, these practices help to maintain a balance of airflow and cleanliness in the air we breathe, significantly enhancing indoor air quality. This method is holistic, addressing multiple factors that can negatively impact air quality, unlike the other options which do not effectively tackle the root of indoor pollution or air quality issues.