The Winix Size 21 Replacement Filter Set (115115) includes a true HEPA filter and 4 carbon pre-filters. That's enough filters to last an entire year. The true HEPA filter lasts up to 1 year and each carbon pre-filter lasts 3 months. Customers who purchase this filter package will need to remove the cartridge provided with Winix air purifier and only use the HEPA and a carbon filter to catch particles and odors. The mesh shield and antibacterial pre-filter are not included with this package.
This filter set is designed to fit Winix air cleaner models P300, U300, 9500, 9000, 6300, 5500, 5300, 5000B, 5000.