What regular action is recommended to ensure optimal air quality?

Routine inspection and cleaning of air ducts is essential to maintaining optimal air quality. Over time, dust, allergens, and other pollutants can accumulate in air ducts, leading to poor indoor air quality. By regularly inspecting and cleaning these ducts, you ensure that the air circulating through your HVAC system remains as clean as possible. This action reduces the likelihood of respiratory issues and promotes a healthier living environment.

Other actions, although they may have their merits, do not directly support the same level of air quality improvement as regular duct maintenance. Changing thermostat settings frequently can lead to energy inefficiency rather than directly impacting air quality. Painting walls in light colors may enhance aesthetic appeal and lighting conditions but does not affect air quality. Increasing humidity levels can sometimes lead to the growth of mold and dust mites, which would negatively impact air quality rather than improve it. Thus, routine inspection and cleaning of air ducts stands out as the most effective practice for ensuring optimal air quality.