How can HVAC systems help in controlling indoor air pollutants?

HVAC systems are designed to enhance indoor air quality through several mechanisms, with one of the primary functions being the filtration of air and improvement of ventilation. By incorporating high-efficiency air filters, HVAC systems can capture dust, allergens, and other particulate matter present in the indoor environment, thus reducing the concentration of airborne pollutants. This filtration process ensures that the air circulating within the space is cleaner and healthier for occupants.

Additionally, effective ventilation is crucial for maintaining indoor air quality. HVAC systems facilitate the exchange of stale indoor air with fresh outdoor air, which helps dilute indoor contaminants. This is particularly important in modern buildings that are often tightly sealed to improve energy efficiency; without proper ventilation, indoor air can become stagnant and polluted.

While duct cleaning, outdoor air intake control, and sealing windows and doors can contribute to managing indoor air quality, they are not as comprehensive or effective as the dual action of filtration and ventilation provided by an HVAC system. Regular duct cleaning may assist in removing accumulated dust but does not actively filter or ventilate air, and reducing outdoor air intake could lead to a buildup of pollutants rather than reducing them. Sealing windows and doors might improve energy efficiency but could worsen indoor air quality if ventilation is compromised. Therefore, the ability of HVAC systems