Which filter fits the Winix GA-FILTER(AU)?

The Winix GA-FILTER(AU) takes the Winix GA Filter Set (C545): HEPA + 4 carbon (part GA-FILTER(AU)). Compatible filters made to the same specification also fit.

How often should I replace the filter in my Winix GA-FILTER(AU)?

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 GA-FILTER(AU) in Australia?

We track 1 Australian seller for the GA-FILTER(AU); the lowest listed price when we last checked was A$149.00 at ausclimate. Prices are re-checked daily and dated on this page.

How do I fit the GA-FILTER(AU) in a Winix GA-FILTER(AU)?

No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.

Air purifier filter · Winix

Winix GA Filter Set (C545): HEPA + 4 carbon

Part codeGA-FILTER(AU)

Replace every 12 months
Fits inside the fridge
Fits 1 model

Winix GA Filter Set (C545): HEPA + 4 carbon

Sellers from

$149

1 seller compared

The one-year filter set for the Winix C545: a True HEPA filter and four activated-carbon filters (one per quarter).

Reduces

Fine dust, pollen and allergens
Odours and gases (activated carbon)

Pack: HEPA filter and 4 carbon filters
Lasts: 12 months (carbon filters change every 3 months)

Every number this part goes by

Retail name:: GA-FILTER

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.

AusclimateGenuine part · Lowest genuine$149checked 1 Aug

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.

How To Change Filters For Winix C545 Air Purifier And Reset The Indicator Lightlet's do a recap · YouTube

Betterment Travel

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

C545

Common questions

Which filter fits the Winix GA-FILTER(AU)?: The Winix GA-FILTER(AU) takes the Winix GA Filter Set (C545): HEPA + 4 carbon (part GA-FILTER(AU)). Compatible filters made to the same specification also fit.
How often should I replace the filter in my Winix GA-FILTER(AU)?: 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 GA-FILTER(AU) in Australia?: We track 1 Australian seller for the GA-FILTER(AU); the lowest listed price when we last checked was A$149.00 at ausclimate. Prices are re-checked daily and dated on this page.
How do I fit the GA-FILTER(AU) in a Winix GA-FILTER(AU)?: No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.

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