Blue Signature™ Medium Replacement Filter

Fresh air you can feel and smell

7 stages of filtration capture tiny airborne pollutants while OdorFence™ Technology helps break down common odors.

Easy to replace. Easy to remember.

Simple filter changes and RealTrack™ monitoring take the guesswork out of keeping your purifier performing its best.

4.3

Rated 4.3 out of 5 stars

4.3 Stars (3 Reviews)

Blue Signature™ Medium Replacement Filter

Keep Blue Signature™ performing at its best with long-lasting 7-stage filtration designed to tackle particles, allergens & household odors.

Designed for

Blue Signature™ Medium

Great for

Everyday clean air, allergy season, smoky days

Size: Medium

Filter Subscription

1 Replacement Filter
Delivered Every 12 Months
Pay when we send it
Save 15% on recurring filter replacements

Most Popular

Free & fast shipping
30 day home trial
Free extended warranty

Why 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.

Fresh air you can feel and smell

7 stages of filtration capture tiny airborne pollutants while OdorFence™ Technology helps break down common odors.

Easy to replace. Easy to remember.

Simple filter changes and RealTrack™ monitoring take the guesswork out of keeping your purifier performing its best.

Smart filtration, you can trust

How to find your model

Unlock your phone & tap & hold it to the sticker on the cage of your device. It automatically direct you to the compatible filter.
Smart filtration, you can trust

Blueair’s proprietary RealTrack algorithm accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.
Subscribe & save 15%

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 superior filtration and smart VOC sensing for 10x³ more odor removal

Smart VOC sensing continuously detects airborne gases and chemical pollutants in real time. HEPASilent filtration technology captures at least 99.97%² of tiny airborne pollutants down to 0.1 microns, such as fine particles, dust mite allergen, pollen, bacteria, virus and mold allergen⁴ OdorFence captures common odor gases and breaks them down. It’s deep, effortless clean air you can feel, and smell, every day.

FAQ

How often do I need to change the filter?

Your filter will last up to 1 year thanks to our unique patent-pending design & proprietary RealTrack algorithm that accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.

When it's time to replace the filter, the filter replacement LED on the interface will turn red to remind you. Alternatively, connect to the Blueair app to receive an alert and easily re-order at the touch of a button.

What are the noise levels?

What room size is best?

*Blueair 3-in-1 T10i in Boosted purification mode tested on CADR (AHAM AC-1) vs Dyson & Shark 3-in-1 air purifiers at max fan speeds.

¹Tested on PM2.5 up to 90 minutes.

²Tested on bacteria (S. aureus, K. pneumoniae, P. aeruginosa), virus (MS2) and mold allergen (A.niger) with a minimum reduction rate of 99.8% in 60 min. Blueair does not claim to prevent transmission of airborne illnesses.

³Comparing CADR performance of Blueair models with mechanical and electrostatic filtration vs same models with only H13 HEPA mechanical filtration.

⁴Noise refers to the dB(A) difference in acoustic power.Cools through fan, not air conditioning

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