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Winix C909 replacement filter

Winix C909 has 4 primary replacement filter parts: 1712-0004-10, 1712-0004-11, 1712-0004-12, 115115. Match the role and part number before ordering.

Quick fit check

Match the exact filter before buying

The official manufacturer source identifies these primary parts for the Winix C909.

Specialty replacement filter set Filter A +AllergenGuard 1712-0004-10
View part details Official Winix source
Specialty replacement filter set Filter A +SmokeGuard 1712-0004-11
View part details Official Winix source
Specialty replacement filter set Filter A +PetGuard 1712-0004-12
View part details Official Winix source
Primary replacement filter set Filter A 115115
View part details Official Winix source

Cited package contents

Package details below come from the linked official source; recheck it before buying.

Filter A 115115

All compatible part numbers

Primary, optional, specialty, and alternative filters are listed separately so you can match the role as well as the part number.

Filter Part number Role Source
Filter A +AllergenGuard 1712-0004-10 Specialty replacement filter set Winix America Filter A +AllergenGuard - 1712-0004-10
Filter A +SmokeGuard 1712-0004-11 Specialty replacement filter set Winix America Filter A +SmokeGuard - 1712-0004-11
Filter A +PetGuard 1712-0004-12 Specialty replacement filter set Winix America Filter A +PetGuard - 1712-0004-12
Filter A 115115 Primary replacement filter set Winix America Filter A - 115115

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 A +AllergenGuard 1712-0004-10

Official Winix America product page identifies Filter A +AllergenGuard, SKU 1712-0004-10, as compatible with models 5300, 5300-2, 5500, 6300, 6300-2, 9800, AM90, C535, C909 and P300.

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

Filter A +SmokeGuard 1712-0004-11

Official Winix America product page identifies Filter A +SmokeGuard, SKU 1712-0004-11, as compatible with models 5300, 5300-2, 5500, 6300, 6300-2, 9800, AM90, C535, C909 and P300.

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

Filter A +PetGuard 1712-0004-12

Official Winix America product page identifies Filter A +PetGuard, SKU 1712-0004-12, as compatible with models 5300, 5300-2, 5500, 6300, 6300-2, 9800, AM90, C535, C909 and P300.

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

Filter A 115115

Official Winix America product page identifies Filter A, SKU 115115, as compatible with models 5300, 5300-2, 5500, 6300, 6300-2, 9800, AM90, C535, C909 and P300.

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

Buying checklist

How to choose the right replacement

Match the Winix C909 model label and the exact part number above. Marketplace listings can be OEM or aftermarket, and a similar-looking filter may have different dimensions.

Compare the listing title, product photos, included filter pieces, seller details, delivery estimate, and total price before you order.

Care guidance

Replacement schedule

  • Filter A +AllergenGuard 1712-0004-10: 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.
  • Filter A +SmokeGuard 1712-0004-11: 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.
  • Filter A +PetGuard 1712-0004-12: 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.
  • Filter A 115115: 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.

Optional calendar tool

Plan your next filter change

Choose a date to download a calendar reminder based on the cited replacement guidance.

Filter A — True HEPA Filter 115115

The calendar reminder starts 12 months after this date and repeats on that schedule.

Filter A — Activated Carbon Filter 115115

The calendar reminder starts 3 months after this date and repeats on that schedule.

Your date is processed only in this browser. The .ics calendar file is generated locally on your device and is not uploaded to this site.

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Frequently asked questions

What filter does the Winix C909 use?

The Winix C909 uses Filter A +AllergenGuard (1712-0004-10), Filter A +SmokeGuard (1712-0004-11), Filter A +PetGuard (1712-0004-12), Filter A (115115). Each part number on this page is backed by an official Winix source.

How often should I replace the Winix C909 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 C909?

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.