A filter for whatever’s in your air

Choose everyday Particle & Carbon, extra AllergenBlock protection, enhanced SmokeBlock odor removal or long-lasting EcoLast™ filtration

Easy to replace. Easy to remember.

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

Blue Pure 311i Max Filter

AllergenBlock

4.2

Rated 4.2 out of 5 stars

4.2 Stars (83 Reviews)

Designed for

Blue Pure 311i Max

Great for

Allergens & pet dander

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1 Replacement Filter
Delivered Every 9 Months
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Free extended warranty

Why you’ll love it

App & Wifi connectivity
Alerts when you need a new a filter
RealTrack Technology®

Features & Technologies

Particle & Carbon captures everyday particles and light household odors.
AllergenBlock traps allergens and helps neutralize their irritating properties.
SmokeBlock uses 2x more activated carbon for smoke, smog and stronger odors.
Main filter media captures dust, pollen, pet dander and PM2.5.
Activated carbon helps trap cooking, pet and smoke odors.
RealTrack™ Technology tracks filter life based on actual use and pollution levels.
App filter alerts tell you when it’s time for a replacement.
Easy replacement design keeps routine maintenance simple.

A filter for whatever’s in your air

Choose everyday Particle & Carbon, extra AllergenBlock protection, enhanced SmokeBlock odor removal or long-lasting EcoLast™ filtration

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

Is this the right filter for you?

Find the Blueair model name on the label inside your air purifier.
Accurate filter lifetime tracking

Blueair’s proprietary RealTrack algorithm accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.
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Main filter

Captures airborne particles, including pollen, dust & pet dander allergen

AllergenBlock Defense Coating

Neutralizes over 90% of allergen properties that trigger discomfort

Activated carbon

Traps light household odors

FAQ

What air purifier is this filter compatible with?

This filter is compatible only with the Blue Pure Max 311i air purifier.

How often should I replace my Blueair air purifier filter?

How do I know when it’s time to change my filter?

How do I reset the red light (filter light indicator) on my Blue Pure Max air purifier?

¹ Tested on PM 2.5 up to 90 mins

² Based on ELISA deactivation testing of Pollen (Cry J1), Pet Dander (Fel d1, Can F1), Dust Mite Matter (Der f1) on the filter media in 60 minutes.

³ Compared to standard in-unit filter. Based on removal testing of particles 0.4-0.7 μm in 60min in a 30m3 room. Performance may vary. Odors: Tested on benzene, toluene, nitrogen oxide, sulfur dioxide in 30 min.

⁵ AllergenBlock refers to inanimate allergens pollen, dust and pet dander

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Blue Pure 311i Max Allergenblock Filter

Is this the right filter for you?

Accurate filter lifetime tracking

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