Which models fit Filter S?

Filter S is currently listed for C545.

Is Filter S universal?

No. Replacement filters, bags, cartridges, and maintenance kits should be matched by exact device model and part family, not by shape alone.

HEPA and carbon filter set compatibility

Filter S Compatible Models

Name: Winix Filter S Replacement Set
Brand: Winix
SKU: Filter S

Winix Filter S Replacement Set

WinixWinixBrandBrand

OEMOEMStatusStatus

12 moAbout every 12 months for HEPA; carbon as neededIntervalReplacement interval

Compatible devices

C545

Winix C545 Air Purifier

Confidence: 84%

Before you buy this replacement

Confirm your exact device model, not only the product family.
Compare the old part number against Filter S.
Check whether the listing includes the full kit or only one filter piece.

Not a universal part

Filter S should be matched to listed models and official part references. Similar-looking replacements can differ by seal, frame, cartridge latch, chip requirement, bag type, or pack contents.

Risk note: Filter S, Filter A, and Filter H are separate Winix families; match the purifier model first.

Source-backed compatibility

3 public source signals checked. FitCheckr weighs official pages, manuals, support docs, retailer listings, and public discussion summaries before showing a fit verdict.

Data sources Methodology Report an issue

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