F3MAX+ SmokeBlock Replacement Filter for 311i+ Max

F3MAX+ SmokeBlock 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 SmokeBlock uses 2x more activated carbon
2X more activated carbon

Removes up to 99.99% of wildfire smoke* along with extra protection against other wildfire emissions

such as toxic gasses, smog, and odors**

Blueair Fabric pre-filter
Fabric pre-filter

The first layer of protection, catches larger particles from the air.

Blueair Main filter
Main filter

Removes airborne allergens, like pollen, dust mite matter allergen, pet dander, germs, mold, bacteria & viruses.

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.

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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+ SmokeBlock 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 15 seconds to reset the replacement filter indicator. ​​

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¹ 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.

*Compared to standard in-unit filter. Based on removal testing of particles 0.4-0.7um in 60min in a 30m3 room. Performance may vary.

**Tested on benzene, toluene, nitrogen oxide, sulfur dioxide in 30 min.