Blueair Blue Signature filter
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 1 August 2026. Fitment confirmed against the manufacturer's compatibility list.
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Your air purifier
Blueair Blue Signature
Air purifier · Blue Signature
Takes this filter
Blue Signature replacement filter
112977
The right filter for Blue Signature
Blueair Blue Signature replacement filter
- Replace every 12 months
- Fits inside the fridge
- Fits 1 model
The main filter for the Blue Signature: Blueair's seven-stage particle and carbon filter with OdourFence, in a design Blueair says lasts twice as long as its Blue Pure Max filters. It only fits the Blue Signature.
Reduces
- Fine dust, pollen and allergens
- Odours, smoke and gases (activated carbon)
- Fits
- Blue Signature (Large)
- Lasts
- Tracked by the Blueair app; about twice a Blue Pure Max filter
Every number this part goes by
- Retail name:
- Blue Signature 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.
How long it lasts
Replace every 12 months (Blueair quotes double the filter life of Blue Pure Max (app tracks actual use)) — the app reminds you.
After fitting: 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 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.
- 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.
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). Worth replacing together — one job, not two.
Checking the model number: 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 models
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.
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