F4MAX AllergenBlock Replacement Filter for 411i Max, 411a Max

F4MAX AllergenBlock Replacement Filter for 411i Max, 411a Max

Compatible with Blue Pure 411i Max • 411a Max; Not compatible with Blue Pure 411 • 411+ • 411 Auto
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Blueair Inside of Blueair Blue Pure Max Air Purifier
Blue Pure 411i & 411a
Max replacement filter

Designed specifically for the Blue Pure 411i and 411a Max.

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

*Only compatible with Blue Pure 411i Max.

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
F4MAX AllergenBlock Replacement Filter for 411i Max, 411a Max
What air purifier is this filter compatible with?

This filter is compatible only with the Blue Pure 411i and 411a Max air purifiers.

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

Press and hold down the LED button for 15 seconds to reset the replacement filter indicator. ​​

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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.