The Samsung AX40T3020WU/SA takes the Samsung CFX-B100/GB 2-in-1 Filter (AX40T3020) as its filter; replace it every 6 months; Australian sellers list it from A$59.80 as of 26 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your air purifier
Samsung AX40T3020WU/SA
Air purifier
Confirmed against Samsung's listConfirmed against Samsung's own compatibility list
Not yours? ChangeSave it · remind me every 6 months
Takes the CFX-B100/GB filter
CFX-B100/GB 2-in-1 Filter (AX40T3020) · replace every 6 months · check the code printed on your old filter before ordering.
Your air purifier
Air purifier
Confirmed against Samsung's listConfirmed against Samsung's own compatibility list
Takes the CFX-B100/GB
Filter · every 6 months · check the code on your old filter.
Other Samsung air purifiers and their filters
The CFX-B100/GB fits the AX40T3020WU/SA only. These Samsung models take a different filter:
GenuineGenuine Samsung
$79.00
Samsung · 26 OctLowest genuine · Samsung · checked 26 Oct
CompatibleCompatible option
$59.80
Amazon AU · 26 OctAmazon AU · checked 26 Oct
Check sellerCheck seller details
Genuine: made by Samsung. Compatible: another brand. Check certification on the seller's page.Genuine is made by Samsung. Compatible is made by another brand. Check the seller's certification details before choosing.
Lowest compatibleLowest compatible price · $59.80
Amazon AU. Compare with genuine below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
Compare 3 sellers
AUD, before delivery. Each price shows when it was checked.
Compatible options
2 sellers
Opens Amazon AU in a new tab. Their page is the source of truth for price, delivery and returns.
Not due yet?
Get a nudge when your filter is due — it's every 6 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the filter in your Samsung AX40T3020WU/SA
Watch the guide or follow the steps.
- 1Switch the purifier off and unplug it.
- 2Pull the back cover forward by its left and right edges, then press down the top clip of the pre-filter and lift it off.
- 3Take out the old 2-in-1 filter. Samsung suggests wearing gloves.
- 4Remove the plastic wrap from the new filter, fit it in the filter frame and refit the pre-filter (bottom first, then the top clip).
- 5Hook the back cover into the grooves at the bottom and press its edges into the eight holes. Switch on and hold the filter reset (3 sec) button for 3 seconds until it chimes.
Every number this part goes by
- Retail name:
- CFX-B100
- Retail name:
- CFX-B100/GB
- Retail name:
- CFX-B100GB
- Retail name:
- Samsung CFX-B100/GB
Sellers list any of these; they are the same part.
About your Samsung AX40T3020WU/SA
Samsung air purifier — AX40T3020. Its filter is the CFX-B100/GB 2-in-1 Filter (AX40T3020), part CFX-B100/GB, changed every 6 months.
Where the model number is: The model number is on the rating label on the bottom or back of the purifier; the old filter usually has its own code printed on the frame.
Fits this Samsung model
Samsung1 model
Common questions
- Which filter fits the Samsung AX40T3020WU/SA?
- The Samsung AX40T3020WU/SA takes the Samsung CFX-B100/GB 2-in-1 Filter (AX40T3020). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Samsung AX40T3020WU/SA?
- Every 6 months. It works less well as the filter fills up, so it's worth doing on time.
- Where can I buy the CFX-B100/GB in Australia?
- We track 3 Australian sellers for the CFX-B100/GB; the lowest listed price when we last checked was A$59.80 at Amazon AU. Prices are re-checked daily and dated on this page.
- How do I fit the CFX-B100/GB in a Samsung AX40T3020WU/SA?
- No tools, a few minutes: 5 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 reminder?
- With the purifier on, hold the filter reset (3 sec) button for 3 seconds until you hear a chime.
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