FitMatch

The Winix AUS-9500 takes the Winix 21WC Filter Cartridge Pack (9500 Ultimate AUS-9500) as its filter; replace it every 12 months; Australian sellers list it from A$159.00 as of 22 October 2026. Fitment confirmed against the manufacturer's compatibility list.

Winix AUS-9500

Your air purifier

Air purifier

Confirmed against Winix's list

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21WC-FILTER

Takes the 21WC-FILTER

Filter · every 12 months · check the code on your old filter.

Other Winix air purifiers and their filters

The 21WC-FILTER fits the AUS-9500 only. These Winix models take a different filter:

Genuine

$159.00

Ausclimate · 22 Oct

Compatible

See seller

No compatible seller tracked yet

Genuine: made by Winix. Compatible: another brand. Check certification on the seller's page.

Lowest price · $159.00

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AUD, before delivery. Each price shows when it was checked.

AusclimateGenuine · checked 22 Oct$159.00Open
Open cheapest seller · $159.00

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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.

Also saves the model to a FitMatch account under this address; the email signs you in, no password.

How to change the filter in your Winix AUS-9500

Watch the guide or follow the steps.

No clear video for this part yet. The steps cover it.

  1. 1Switch the purifier off and unplug it.
  2. 2Pull the front panel off from the bottom edge and lift out the old filters in order: pre-filter, carbon filter, then HEPA filter.
  3. 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.
  4. 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.

About your AUS-9500

Winix air purifier, air purifier — 9500 Ultimate 5-stage. Its filter is the 21WC Filter Cartridge Pack (9500 Ultimate AUS-9500), part 21WC-FILTER, changed every 12 months.

Where the model number is: Look at the rating label on the back or the underside of the purifier: the model is the type code (AUS-1250AZPU, WXAP800W, 5500-2), not the marketing name. The filter pack code (GT, GI, GQ…) is printed on the old filter's frame.

Fits these 1 Winix model

Winix1 model

Common questions
Which filter fits the Winix AUS-9500?
The Winix AUS-9500 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 AUS-9500?
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 AUS-9500?
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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