Exact model stated by the manufacturer

WINIX C909 replacement filter

Documented OEM reference: Filter A · SKU 115115; separate Filter A +AllergenGuard set · SKU 1712-0004-10

The C909 manual names Filter A / SKU 115115. WINIX separately lists C909 as compatible with the Filter A +AllergenGuard annual set, SKU 1712-0004-10. This is a distinct product/set identifier, not an alias for or proof of equivalence to SKU 115115.

Limits. US-source evidence only; no Canada or UK fitment or availability is established. Treat the annual set as a distinct OEM product from Filter A SKU 115115. Aftermarket fit and performance are untested.

WINIX official C909 user manual · US ↗

Source market: US · Checked 2026-10-20. No stock, price, or seller claim is made. Fit is not filtration performance.

Other models listed for the same part

WINIX C535
WINIX 9800

One part listed for several models does not make those purifiers interchangeable.

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Related guides

WINIX

WINIX replacement filters by model →

Cite this page

Use this text to cite the page. The last-updated date is the date of the latest change to its content.

Filter Ledger. “US WINIX C909 Replacement Filter”. https://filters.toolatlas.app/en-us/filters/winix-c909/. Last updated October 23, 2026.