Air purifier filter
Winix 21WC Filter Cartridge Pack (9500 Ultimate AUS-9500)
21WC-FILTER
Fits 1 model · replace every 12 months
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GenuineGenuine Winix
$159.00
Ausclimate · 22 OctLowest genuine · Ausclimate · checked 22 Oct
CompatibleCompatible option
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No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Winix. Compatible: another brand. Check certification on the seller's page.Genuine is made by Winix. Compatible is made by another brand. Check the seller's certification details before choosing.
Lowest price · $159.00
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AUD, before delivery. Each price shows when it was checked.
Opens Ausclimate in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Usually every 12 months. The filter light is a reminder, not a water-quality sensor.
After replacing: 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.
Not due yet?
Get a nudge when your filter is due — it's every 12 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the 21WC-FILTER filter
Watch the guide or follow the steps.
No clear video for this part yet. The steps 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.
Every number this part goes by
- Retail name:
- 21WC
- Retail name:
- 21WC-FILTER
Sellers list any of these; they are the same part.
Will it fit your appliance?
Type your model number and we'll check it against the makers' lists.
Fits these 1 Winix model
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.
- What happens if I don't change it?
- The fan works harder for less airflow, and the carbon layer stops taking smells out well before the filter looks dirty.
- How do I reset the filter light?
- After fitting, hold the filter reset button until the filter light goes out.
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