7 stages of filtration capture tiny airborne pollutants while OdorFence™ Technology helps break down common odors.
Simple filter changes and RealTrack™ monitoring take the guesswork out of keeping your purifier performing its best.
Blue Signature™ Large Replacement Filter
Keep Blue Signature™ performing at its best with long-lasting 7-stage filtration designed to tackle particles, allergens & household odors.
Fast & free shipping
30-day returns
Extended warrantyWhy you’ll love it
Long-lasting filtration that keeps clean air simple and takes the guesswork out of replacement.
- Helps capture dust, pollen & pet dander
- Tackles everyday household odors
- Lasts longer for fewer filter changes
- Tracks filter life based on how you actually use your purifier
- Alerts you when it’s time for a replacement
- Designed for a quick, hassle-free swap
Up to 1-year
filter lifetime 
Accurate filter lifetime tracking 
App replacement alerts 
Quick & easy filter
changes
Features & Technologies
- HEPASilent™ Technology captures 99.97% of airborne particles down to 0.1 microns.
- OdorFence™ Technology captures and breaks down common odor gases.
- 7-stage filtration tackles particles, allergens and odors.
- RealTrack™ Technology calculates remaining filter life based on fan speed, usage and pollution levels.
- Replacement alerts tell you when it’s time for a fresh filter.
- Durable filter design means fewer replacements.
- Easy replacement keeps routine maintenance simple.
Product Notes
² Tested on PM2.5 up to 90 minutes.
7 stages of filtration capture tiny airborne pollutants while OdorFence™ Technology helps break down common odors.
Simple filter changes and RealTrack™ monitoring take the guesswork out of keeping your purifier performing its best.
Smart filtration, you can trust
Unlock your phone & tap & hold it to the sticker on the cage of your device. It automatically direct you to the compatible filter.
Blueair’s proprietary RealTrack algorithm accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.
Dirty filters clean the air less efficiently. Sign up for a filter subscription & get fresh filters delivered right when you need them.
7 stages of filtration, 10x more odor removal
HEPASilent filtration technology captures at least 99.97%² of tiny airborne pollutants down to 0.1 microns while OdorFence Technology captures common odor gases and breaks them down. It’s deep, effortless clean air you can feel, and smell, every day.
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Originally published on Blueair US
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