The Blueair Blue Signature takes the Blueair Blue Signature replacement filter (part 112977) as its filter; replace it every 12 months; Australian sellers list it from A$99.00 as of 21 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your air purifier
Blueair Blue Signature
Air purifier
Confirmed against Blueair's listConfirmed against Blueair Australia's compatibility list
Not yours? ChangeSave it · remind me every 12 months
Takes the 112977 filter
Blue Signature replacement filter · replace every 12 months · check the code printed on your old filter before ordering.
Your air purifier
Air purifier
Confirmed against Blueair's listConfirmed against Blueair Australia's compatibility list
Takes the 112977
Filter · every 12 months · check the code on your old filter.
Other Blueair air purifiers and their filters
The 112977 fits the Blue Signature only. These Blueair models take a different filter:
GenuineGenuine Blueair
$99.00
Blueair Au · 21 OctLowest genuine · Blueair Au · checked 21 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Blueair. Compatible: another brand. Check certification on the seller's page.Genuine is made by Blueair. Compatible is made by another brand. Check the seller's certification details before choosing.
Lowest price · $99.00
Blueair Au. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
This air purifier also takes a pre-filter
- Blueair Blue Signature pre-filterOpen Blueair Au$22.99
Separate from the filter. Reduces hair, lint and large dust before the main filter. Replace every 12 months.
Compare 1 seller
AUD, before delivery. Each price shows when it was checked.
Opens Blueair Au in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Usually every 12 months (Blueair quotes double the filter life of Blue Pure Max (app tracks actual use)). The app reminds you when it is due.
After replacing: Hold the button on the top of the purifier until the filter light goes out, or clear it in the Blueair app.
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 filter in your Blueair Blue Signature
Watch the guide or follow the steps.
- 1Switch the purifier off and unplug it.
- 2Lift the top off the Blue Signature as shown in Blueair's tutorial and lift the old filter out.
- 3Unwrap the new filter and drop it in, then refit the top.
- 4Plug in and reset the filter timer in the Blueair app.
Every number this part goes by
- Retail name:
- 112977
- Retail name:
- Blue Signature filter
Sellers list any of these; they are the same part.
About your Blueair Blue Signature
Blueair air purifier, air purifier — Blue Signature. Its filter is the Blue Signature replacement filter, part 112977, changed every 12 months.
Also in this air purifier: Blueair Blue Signature pre-filter (every 12 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 these 1 Blueair model
Blueair1 model
Common questions
- Which filter fits the Blueair Blue Signature?
- The Blueair Blue Signature takes the Blueair Blue Signature replacement filter (part 112977). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Blueair Blue Signature?
- 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 112977 in Australia?
- We track 1 Australian seller for the 112977; the lowest listed price when we last checked was A$99.00 at Blueair Au. Prices are re-checked daily and dated on this page.
- How do I fit the 112977 in a Blueair Blue Signature?
- 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?
- Hold the button on the top of the purifier until the filter light goes out, or clear it in the Blueair app.
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