Winix Size 21 Replacement Filter Set (115115) includes a True HEPA filter and 4 carbon pre-filters, for a full year's worth of filters.
Fits Winix Air Cleaner Models: P300, U300, 9500, 9000, 6300, 5300, 5000B, 5000.
- 1 True HEPA Filter (that provides protection for an entire year)
- 4 Activated Carbon Filters
- Replace the carbon filters every 3 months
Note: If you are purchasing this filter set for the Winix 5000 or 9000 Air Purifiers, you will need to remove the entire filter cassette from your unit and replace it with the HEPA filter and 1 carbon filter included in this filter set.