F3MAX AllergenBlock Replacement Filter for 311i Max

F3MAX AllergenBlock Replacement Filter for 311i Max

Compatible with Blue Pure 311i Max; Not compatible with Blue Pure 311i+ Max • 311 Auto
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Blueair Inside of Blueair Blue Pure Max Air Purifier
Blue Pure 311i Max replacement filter

Designed specifically for the Blue Pure 311i Max.

Find the name of your air purifier on the label inside your air purifier.

Blueair Blueair AllergenBlock reduces exposure to allergens
Extra protection
against allergens

Blueair’s AllergenBlock¹ technology reduces your exposure to pollen, pet dander, and dust allergens,

by neutralizing over 90%² of their sneeze-inducing properties once caught on the filter.

Blueair Main filter
Main filter

Captures airborne particles, including pollen, dust, and pet dander allergens.

Blueair AllergenBlock defense
AllergenBlock defense

Neutralizes² over 90% of the allergen properties that can trigger discomfort.

Blueair Activated carbon
Activated carbon

Traps strong household odors from smoke and wildfire particles.

Blueair Blueair RealTrack Technology
Real-time filter
lifetime status

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

Blueair Blueair genuine filter
Genuine Blueair
replacement filter

Protect your air purifier from damage

caused by unofficial filters.

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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 more quietly while using less energy.

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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 AQI icon
Minimizes unhealthy allergens and germs*

With the unique filter design at least 99.97%³ of airborne particles, even down to 0.1 microns, are removed, while using less energy and producing less noise.

  • Recommended filter change
    6 months (4,380 hours) when used 24 hours a day
  • Number of filters
F3MAX AllergenBlock Replacement Filter for 311i Max
What air purifier is this filter compatible with?

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

I've replaced my filters, now how do I reset the filter replacement indicator?​

Press and hold down the LED button for 10 seconds to reset the replacement filter indicator. ​​

How often should I replace the filter on my Blue Pure Max air purifier?

Quick cleaning: Vacuum the fabric pre-filter every time you do a big cleaning at home or when you see dust building up. Vacuum the exterior of the fabric with a soft brush attachment.

Deep cleaning: Wash the fabric pre-filter every time you replace the Particle & Carbon filter, approximately every 6 months. Wash the fabric pre-filter in a washing machine according to the pre-filter’s label. Hang to dry. 

Regular maintenance of your air purifier will help preserving optimal performance.

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¹ AllergenBlock refers to inanimate allergens pollen, dust and pet dander.

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 A flat shipping rate of $25.00 will be charged on filter shipments to Alaska, Hawaii, and Puerto Rico. Additional charges may apply for shipments over 30 lbs. A flat shipping rate of $5 will be charged on orders under $39 that are not part of filter subscription.