Vornado Replacement PreSorb Filters / Model 15

These Replacement Filters are designed to be used with the Professional Air Cleaning Systems Model 15. The PreSorb filter is an activated coconut carbon prefilter. Coconut carbon is the best adsorbent available, helping reduce many common household and commercial odors and organic compounds. PreSorb filters should be changed every 30 days. 4 per pack.