Air purifier filter · Winix
Winix 21WC Filter Cartridge Pack (9500 Ultimate AUS-9500)
- Replace every 12 months
- Fits inside the fridge
- Fits 1 model
The replacement cartridge pack for the Winix 9500 Ultimate (AUS-9500): washable pre-filter, hospital-grade True HEPA filter, washable activated-carbon filter and the anti-bacterial mesh shield.
Reduces
- Fine dust, pollen and allergens
- Odours and gases (activated carbon)
- Pack
- Pre-filter, HEPA, carbon filter and mesh shield
- Lasts
- 12 months
Every number this part goes by
- Retail name:
- 21WC
Where to buy
Every seller we track for this part, cheapest first. Genuine is the manufacturer's own part; compatible is a third-party filter made to fit. Prices are re-checked daily where the seller publishes them. Last checked 1 August 2026.
How long it lasts
Replace every 12 months — the appliance's filter light tells you when.
After fitting: After fitting, hold the filter reset button until the filter light goes out.
Flow slows and taste drops off as the filter fills up. Changing on time is the whole point of the filter.
Not due yet?
This filter is due every 12 months. We'll email you when it's time — free, no spam.
Fitting it
A few minutes, no tools. Watch it done, then follow the steps.
We haven't found a clear video for this filter yet. The steps on the right cover it.
- 1Switch the purifier off and unplug it.
- 2Pull the front panel off from the bottom edge and lift out the old filters in order: pre-filter, carbon filter, then HEPA filter.
- 3Take the new filters out of their plastic bags and fit them the same order and way round — HEPA at the back, carbon in front, pre-filter last.
- 4Refit the panel, plug in, and hold the filter reset button until the filter light goes out.
Will it fit your appliance?
Type your model number and we'll check it against our fitment database.
Fits these models
Winix1 model
Common questions
- Which filter fits the Winix 21WC-FILTER?
- The Winix 21WC-FILTER takes the Winix 21WC Filter Cartridge Pack (9500 Ultimate AUS-9500) (part 21WC-FILTER). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Winix 21WC-FILTER?
- Every 12 months. Flow slows and performance drops off as the filter fills up, so it's worth doing on time.
- Where can I buy the 21WC-FILTER in Australia?
- We track 1 Australian seller for the 21WC-FILTER; the lowest listed price when we last checked was A$159.00 at ausclimate. Prices are re-checked daily and dated on this page.
- How do I fit the 21WC-FILTER in a Winix 21WC-FILTER?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
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