This Dynamic® Replacement Media Filter is for 84-24X24-1 and 84-24X24-2 and features an activated-carbon center screen that effectively removes cigarette smoke, dust, pollen, odors, and other contaminants. A media filter's primary function is to clean the air by trapping these pollutants. It is essential to use only genuine Dynamic® replacement media filters with Dynamic® Air Cleaners, as other replacement filters are not compatible