Air quality expert Tony Abate says that yes, the central filters of an AC system can help to remove dust.
'There are several things to consider regarding filters, one is to be sure your filters seal well against the frame they are placed into, otherwise, the air will bypass the filter,' he adds. 'Use a pleated filter between 80 to 90% efficiency and change them every three months to ensure good capture and good airflow from your AC. Dirty clogged filters restrict airflow which hurts indoor air quality and can damage your AC unit.'