Blue Signature™ Small Replacement Filter

Blue Signature™ Small Replacement Filter

Compatible with Blue Signature™ Small Air Purifier

Size: Small

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Blue Signature™ Small Replacement Filter

This filter is only compatible with the Blue Signature ™ Medium

Designed for easy replacements, ensuring hassle-free maintenance for continuous clean air
Crafted with durable materials for a long-lasting filter
Effectively captures allergens like dust, pollen, and pet dander

Alerts when you need a new filter
RealTrack Technology®
Double* the filter lifetime

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.
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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 allergen⁴OdorFence 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?

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*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.

1 Tested on PM2.5 up to 90 minutes.

2 Tested 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.

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

4 Noise refers to the dB(A) difference in acoustic power.

Cools through fan, not air conditioning

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