Fits checked Oct 1, 2026 · How we check
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Winix · air purifier

Winix C545 replacement filter

Use part 1712-0096-00. Replace True HEPA every 12 months; carbon filter every 3 months.

The filter that fits

Maker lists this model

Winix Filter S

Winix Replacement Filter S

Part number
1712-0096-00
How many
1 per unit
How often
Replace True HEPA every 12 months; carbon filter every 3 months
Buy Filter S on AmazonManufacturer page

Opens an Amazon search for Winix Filter S 1712-0096-00. Check the listing says 1712-0096-00.

See the sources

Look-alike models that take a different filter

The C535 takes Filter A (115115) and the C555 takes Filter I (116131), not Filter S.

Other genuine options from Winix

Variants and kits the maker sells for this model. Same fit, different media or packaging.

Sources

High confidence: the manufacturer names this exact model on a live page. Each line is the page we read and the day we read it.

  • Which filter fits winixamerica.com Maker's own page checked Oct 1, 2026
    Filter S – 1712-0096-00 ... Compatible with Winix air cleaner model C545
  • How often winixamerica.com Maker's own page checked Oct 1, 2026
    change the True HEPA* Filter once every 12 months and the Carbon Filter once every 3 months
  • What's in it winixamerica.com Maker's own page checked Oct 1, 2026
    True HEPA* Filter: Captures up to 99.99% ... Activated Carbon Filters (4-pack): Reduces VOCs and household odors
  • Other genuine options winixamerica.com Maker's own page checked Oct 1, 2026
    Filter S +PetGuard sku 1712-0096-09, +AllergenGuard 1712-0096-07, +SmokeGuard 1712-0096-08; each "Compatible with Winix air cleaner model C545"