Blue Pure 311 Auto

Medium spaces
Includes a washable pre-filter in Arctic Trail
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Blueair recommends a filter change every 6 months
$249.99
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Free extended warranty
Blueair SmokeBlock
Introducing NEW SmokeBlock Filters

Upgrade your Blue Pure 311 Auto’s filter with the ultimate tool against wildfire season. Additional 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**


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Overview

You get it all. Compact and customizable design. Effortless operation. 360 degrees of advanced filtration. Just plug it in and auto settings do all the work for you. Cleaning the air has never been this easy.

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Top Pick - 4.5/5 Stars
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Wirecutter Pick - The Best Air Purifier 2021, 2020, 2019
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Medium sized spaces, maximum air quality

Filters the air in a 388 ft² space in about 12.5 min¹ (4.8x an hour, based on AHAM recommended removal rate) or up to 1,862 ft² in one hour on high speed to effectively lower particle levels and maintain a comfortable environment in spaces like primary bedrooms and playrooms.

Blueair Blue 311 Auto CADR vs roomsize graphic
Three layers of ultra-advanced filtration

An outer fabric washable pre-filter starts the process by removing larger particles. This also extends the life of the main filter.


The main particle filter removes everything from pollen, dust and pet dander to viruses and bacteria.


Then a layer of activated carbon goes to work, ridding households of light odors from pets, cooking and smoking.

Blueair 311 xray view of different parts to show  3 layers of filtration
Blueair Particle in Filtration Stage
Maximum filtration.
Minimum noise.

Only Blueair air purifiers use HEPASilent™ dual filtration technology, delivering maximum filtration with minimum noise. This dual filtration technology pioneered by Blueair combines electrostatic charging of particles and mechanical filtration along with a unique filter designed to produce more² clean air, cleaning your air much faster and more quietly³ than traditional HEPA filtration alone.


Blueair particle getting caught in filter material
Captures 99.99% of SARS-COV-2 (COVID-19) in a 640ft³ room*

*Blue Pure 411 Auto tested to remove SARS-COV-2 in a 640ft³ chamber, in 60 mins on high. Performed under standard laboratory conditions and actual performance may vary. Not proven to kill SARS-CoV-2 or prevent transmission of COVID-19.







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Jump to right speed, with auto mode

One touch auto mode uses a particle sensor to constantly adjust the fan to the perfect setting. An LED display reports on air quality with three colors.


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Five premium fabric colors to play with

Easily customize your air purifier to sleekly blend into any space with up to five washable pre-filter fabric colors. Scandanavian inspired Arctic Trail is included.

Blueair Graphic showing 360 degree filtration from Blue Pure 311 Auto
Easy to place

A 360-degree air intake means you can place the 311 Auto almost anywhere without compromising performance. Combine this with its compact and lightweight design, and you have an air purifier that is easy to move and place wherever suits you.


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Sound design you can sleep on

Get clean air while you work or sleep without disruption. Operates at noise-levels that are a whisper quiet 23 dB on its lowest speed, and no louder than a 53 dB rainfall on its highest setting.

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The no comparison, comparison

When independently tested, Blueair consistently outperforms models from other leading brands. The Blue Pure 211+ Auto delivers 6x more clean air than Dyson's HP04*

Independently proven performance
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Verifide(R) for performance and Clean Air Delivery Rate (CADR).
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Certified to meet ozone safety standards.
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Rated as energy-efficient air purifiers.
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Zero Ozone Verified (<5 ppb) by Intertek Sustainability Program.
Details
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ENERGY STAR rated for efficiency

This certified air purifier uses less energy than an average LED lightbulb (about 10 W) at 3W on lowest setting and up to 35W on high. Confidently run it for quality air 24/7. 

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Pre-filter for extended filter life

While the colorful fabric of the washable pre-filter looks great, it also extends the life of its primary filter by catching large particles. Its fabric can be vaccummed or put in a washing machine for easy cleaning.

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Multi-status air quality indicator

An AQI, or air quality indicator, uses an LED to display colors for good, moderate, or poor based on the amount of fine, PM2.5, particles an integrated particle sensor finds in your space.

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Filter quality warning system

Never worry about your filter's quality with a built-in LED warning system that glows red when you are due for a refresh. For optimal performance, we recommend replacing filters every 6 months.

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Intuitive single-button design

With just one button to press and keep an eye on for filter status, you'll never be fussing with settings or wondering about air quality.

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Auto-dimming LED light

Interact with your air purifier and it brightens up for easy reading, then after approximately 7 seconds, the LED light will automatically return to a calming 10% level of brightness."

  • Wi-Fi connectivity for remote control
    No
  • On/off timer
    No
  • Filter replacement indicator
    Yes
  • Speed control options
    AUTO- 1-2-3
  • Wheels
    No
  • Integrated air sensors
    Yes, particle sensor
Inlcuded in the box

Items packaged individually within box - please read manual for set-up instructions.

Blueair Blue Pure 311 Auto air purifier

Blue Pure 311 Auto air purifier

Blueair In the box- Washable 411 auto pre-filter in Arctic Trail

Washable pre-filter in Arctic Trail

Blueair IN the box - Instruction manual 211+ auto

Instruction manual

  • Filter Type
    Particle filter + Carbon sheet. Activated coconut shell carbon. Non-woven gradient Polypropelyne fibers. Free of chemicals and binders. Fiber shedding resistance.
  • Dimensions(HxWxD)
    20.5 x 10.2 x 10.2 in
  • Product weight
    6.8lbs
  • Energy consumption
    3-35 W
  • Sound level
    23-53 dB(A)
  • Air outlet
    Top
  • Air inlet
    360°
  • Filter recycling
    Plastic. Check your local recycling requirements for carbon.
  • Recommended filter change
    6 months (4,380 hours) when used 24 hours a day
  • Recommended room size
    388 ft2
  • Air changes per hour (ACH)
    4.8
  • Clean air delivery rate (CADR) - Pollen
    244 cfm
  • Clean air delivery rate (CADR) - Dust
    250 cfm
  • Clean air delivery rate (CADR) - Smoke
    250 cfm
  • Number of filters
    1

Guarantee clean air for years to come with up to 2-years of warranty coverage when you register your air purifier.

How does this model differ from the Blue 411?

With many of the same features of the 411 Auto model (Auto mode, integrated particle sensor, LED air quality indicator),the 311 Auto differs in its slightly larger size, larger recommended room size (up to 388 ft²), and higher Clean Air Delivery Rate (CADR).

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 do I register for warranty?

To extend the Limited Warranty from one year to two (2) years, simply complete the product registration form in the 'Warranty' section of your customer account, within (60) days of purchase or register through the Blueair mobile app.​

How should I clean the fabric pre-filter?

Vacuum the exterior of the fabric pre-filter to remove dust as often as you'd like. When the pre-filter requires a deeper clean, it can be washed on a gentle, low-temperature cycle in the washing machine. Hang to dry.

Why is my LED yellow?

The LED indicator will turn yellow after 5 months of operation to warn that it's almost time to change the filter. When the indicator light turns red (one month later), it’s time to change the main filter.

What is the Air Quality Indicator showing?

The integrated particle sensor measures the concentration of fine particles (PM2.5) in your indoor air. The LED air quality indicator (AQI) display uses a three-color scale to represent current PM2.5 concentrations as good (blue), moderate (yellow), or polluted (red).

What are the settings on this model?

The lights on the LED touch-button indicate the selected fan speed setting. Touch once to set to Auto mode (all three LED lights lit). Press twice for the lowest fan speed (top right LED lit), three times for medium (bottom LED lit), four times for high (top left LED lit). Press a fifth time to turn the air purifier off (no LEDs lit).


You'll notice that after about 5 seconds, the LED lights on the touch-button dim down to 0% brightness. To change speed settings, you'll need to tap the button once to 'wake up' the air purifier and then cycle through settings.

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¹Based on third-party testing of removal rate of fine particles according to GB/T18801-2015 standard and pollen removal rate according to AHAM AC/1-2019 standard. According to AHAM, air changes per hour (ACH) is the measure of the outside air volume added to a space divided by the volume of that space over a set amount of time.


²Comparing CADR performance of Blueair models vs same models with only H13 HEPA.


³At similar CADRs, Blueair Protect 7400 series achieved less noise than same models with only H13 HEPA. Noise refers to the dB(A) difference in acoustic power.


*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.