Cleaner air starts with a fresh filter

Works with HEPASilent™ Technology to remove up to 99.97% of tiny airborne particles while carbon filtration.

Simple upkeep, every six months

A filter replacement indicator lets you know when it’s time for a fresh filter, typically after about six months of use.

2.7

Rated 2.7 out of 5 stars

2.7 Stars (37 Reviews)

Blue Pure 311 Particle + Carbon Filter

Particle + Carbon

Keep your air purifier performing at its best with Particle + Carbon filtration designed to capture everyday airborne pollutants & household odors.

Designed for

Blue Pure 311

Great for

Dust, pollen, pet dander, smoke & everyday household odors

Filter Subscription

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

Most Popular

1 Pack

2 Pack

Free & fast shipping
30 day home trial
Free extended warranty

Why you’ll love it

Reliable everyday filtration that makes keeping your air purifier performing its best simple.

Captures dust, pollen & pet dander
Helps filter PM2.5 and other airborne particles
Helps reduce light cooking and smoke odors
Replace about every 6 months
Filter indicator reminds you when it’s time to change

6 month filter lifetime
Particle + odor filtration
App replacement alerts
Quick & easy filter changes

Features & Technologies

Particle + Carbon filtration tackles everyday particles and light household odors.
Main filter captures PM2.5, pollen, dust mite matter and pet dander allergens.
Activated carbon traps light odors from smoke, cooking and more.
6-month replacement cycle keeps routine maintenance straightforward.
Filter replacement indicator lets you know when it’s time for a fresh filter.
Easy replacement design makes routine filter changes simple.

Cleaner air starts with a fresh filter

Works with HEPASilent™ Technology to remove up to 99.97% of tiny airborne particles while carbon filtration.

Simple upkeep, every six months

A filter replacement indicator lets you know when it’s time for a fresh filter, typically after about six months of use.

Smart Filtration, you can trust

Particle removing filtration, air cleaning carbon, all in one filter

When used as part of our HEPASilent™ filtration process, the Particle + Carbon filter provides protection against odors, chemicals, gases and 99.97%* of airborne pollen, dust and germs*.
Keep your filter fresh and pollutants at bay

We recommend replacing your air purifier filter about every 6 months (when used 24 hours a day). That's because, just like a vacuum cleaner, over time air purifier filters can get clogged with pollutants, and even let unpleasant odors back into the room.

It's simple to replace in just a few quick steps, and easy to save with our filter subscription program.

Main Filter

Captures airborne particles including, PM 2.5, pollen, dust mite matter allergen & pet dander allergen

Activated Carbon

Traps light household odors from smoke, cooking odors and more

FAQ

What Blueair air purifier is compatible with this filter?

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

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

A red filter replacement indicator appears on the air purifier when it is time to change filter, after about 6 months of operation.

After you replace your filter, press the center button down to reset the filter light indicator until the red light disappears. It usually takes 7-10 seconds and may take up to 30 seconds depending on the model.

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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