Winix model lookup
Winix B451 replacement filter
Check the model label and the cited source before ordering.
Part numbers
| Model | Filter | Part number | Role | Source | Marketplace |
|---|---|---|---|---|---|
| Winix B451 | Filter E | 113250 |
Primary replacement filter set | Winix America Filter E - 113250 | Check prices |
Compatibility notes
This page uses factual model and part-number references from cited sources. It does not imply manufacturer affiliation or approval.
Marketplace results can include OEM and aftermarket listings. Match the part number, model number, and listing details before purchase.
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Filter E 113250
Check eBay prices for 113250Frequently asked questions
What filter does the Winix B451 use?
The Winix B451 uses Filter E (113250). Each part number on this page is backed by an official Winix source.
How often should I replace the Winix B451 filter?
Winix sells this as a one-year replacement filter set: replace the True HEPA filter every 12 months and the included activated carbon filters every 3 months. The Filter Replacement Indicator LED on the unit also illuminates when a filter change is due.
Where can I buy a replacement filter for the Winix B451?
Genuine filters are sold on the official Winix America site (linked in the source column), and both genuine and aftermarket filters are listed on eBay. Match the exact part number before buying; Winix states its warranty is voided by non-Winix filters.