Blue Pure 311 Auto Particle + Carbon Filter

Blue Pure 311 Auto Particle + Carbon Filter

Compatible with Blue Pure 311 Auto; Not compatible with Blue Pure 311 • 411 Auto • 411 • 411+
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Blueair 311 Series SmokeBlock Filter
Looking for extra protection from smoke?
Blueair 311 Auto Air Purifier compared to 311

Is this the right filter for you?

This filter is only compatible with the Blue Pure 311 Auto. It is not compatible with Blue Pure 311, 411, 411+, 411 Auto. 


You can identify whether your air purifier is a Blue Pure 311 Auto if it is 20.5” in height. The 311 is 18.5” in height and the 411 series are 17” or shorter. 


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Blueair Blue 311 AUTO filter on blue background

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*.

Blueair Close up of Blue pure 311 auto filter with Genuine Filter replacement icon

Designed for Optimal Performance

Genuine Blueair filters are specifically designed to enable more air flow through the filter media. When combined with electrostatic filtration this results in faster cleaning than traditional HEPA filtration.

Blueair Blue pure 311 auto air purifier showing all various layers of filtration

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.

Blueair icon- less noise and energy
Less noise and energy

Our unique HEPASilent™ filtration technology allows this filter to be less dense, meaning it requires less air pressure. With it installed, your air purifier will operate quieter while using less energy.

Blueair icon for Minimizes unhealthy allergens and germs
Minimizes unhealthy allergens and germs*

The particle filter layer helps to minimize the airborne particles that can trigger allergy symptoms, including pollen, dust, mold spores*, pet dander, viruses*, bacteria*, and fine smoke particles.

Blueair icon- Keeps clean air flowing, resists clogging
Keeps clean air flowing, resists clogging

This filter's unique structure is designed to filter high volumes of air while trapping even the smallest particles. It maintains maximum airflow because it's engineered to resist clogging.

Blueair icon-  Works 24/7, for six months straight
Works 24/7, for six months straight

To maintain optimal performance, we recommend changing your filter about once every 6-months when used 24 hours a day. Don't forget to save with our subscription program.

  • Filter Type
    Carbon + Particle filter. Activated coconut shell carbon pellets in honeycomb envelope. Non-woven Polypropelyne fibers. Free of chemicals and binders. Fiber shedding resistance.
  • Dimensions(HxWxD)
    20.1 x 20.7 x 3.1 in in
  • Product weight
  • Filter frame material
  • Filter recycling
    Yes, please check your local recycling facility for availability.
  • Recommended filter change
    6 months (4,380 hours) when used 24 hours a day
  • Number of filters
What Blueair models are compatible with this filter?

This filter is compatible with the Blue Pure 121 model.

What is a filter subscription?

Program members get 15% off on every filter and exclusive product perks.

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How does this filter differ from the Blue Pure 121 Particle + Carbon filter?

This filter features highly-porous, activated carbon pellets for extra protection against harmful gaseous pollutants like odors, smog, exhaust, volatile organic compounds (VOC), smoke odors, and chemicals. The Combination Particle + Carbon filter uses an activated carbon mesh sheet, designed to remove light household odors and chemicals.

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¹A flat shipping rate of $25.00 will be charged on filter shipments to Alaska and Hawaii. Additional charges may apply for shipments over 30 lbs.

*Tested on E.coli, Influenza A (H1N1), A.niger with minimum reduction of 99.9% in 60min