This can change depending on the filter size as well as other variable factors for pet owners, allergy-sufferers, households with children, etc. Replace every 90 days to keep your system running efficiently and your air clean.
Compatible with: Most Portable Air Cleaners Size: 16 x 48, Cut-to-Fit Long lasting activated carbon filter Superior performance and cost effective Product Just cut the filter to the desired size and start using it.It is that simple! 3 Pack Cut-to-Fit Carbon Pad for Air Purifiers by All-Filters, Inc Sheet Size: 16 by 48 Universal Carbon/Charcoal Prefilter just cut the filter to the size and start using it.