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Winix air purifier

Winix B451 replacement filter

Winix B451 uses Filter E (part 113250) as its primary replacement filter set.

Official Winix fit · checked

Same filter, other models

Other Winix purifiers that use Filter E 113250

Own more than one purifier? These models share the same official part number.

All compatible Winix B451 filters

Every part number below is a primary replacement filter for this model.

Filter Part number Type Price
Filter E 113250 Primary replacement filter set Check price

Price links open sponsored eBay searches for the exact part number.

Before you order

How to buy the right Winix B451 filter

  • Confirm the label on your purifier reads B451.
  • Make sure the listing names part 113250, not just a similar-looking filter.
  • Check the pack size and pieces included. Genuine and third-party filters can differ.
  • Compare the total price with shipping, plus the seller's feedback and delivery estimate.

Care guidance

Replacement schedule

  • Filter E 113250: 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.

Usage and air quality can affect service life. Follow the cited manufacturer guidance for each part.

Frequently 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.

Where can I check replacement filters for the Winix B451?

This page links directly to the cited official Winix product page and shows sponsored individual eBay listings when a fresh exact-part snapshot is available, with an exact-part eBay search fallback. This site does not sell filters; match the part number and review the current source or seller listing before buying.

Official compatibility record

Manufacturer evidence

Each compatibility and care statement below is reproduced from the cited official manufacturer record. Check the source again before ordering.

Filter E 113250

Official Winix America product page identifies Filter E, SKU 113250, as compatible with models B451 and P450.

Source checked
Replacement guidance
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.
Guidance checked

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