Blue Pure 311 Auto

Medium spaces
Blue Pure 311 Auto
Includes a washable pre-filter in Arctic Trail
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Designed for medium rooms

Filters the air at a rate of about 5x an hour (or about every 12 minutes) in a 388 ft² room to effectively lower particle levels and help maintain a comfortable environment in your master bedroom, living room, or playroom.

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Clean air at the touch of a button

The one-touch enabled Auto mode is designed to help you maintain a comfortable home environment. When enabled, the setting automatically adjusts fan speed based on real-time conditions reported by the integrated particle sensor. Stay up to date on your air quality with the LED display; it changes color to indicate good, moderate, or poor.

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Three-part filtration

A fabric pre-filter offers the first layer of protection, catching large particles and extending the life of the primary filter. The combination Particle + Carbon Filter uses a layer of activated carbon to filter light household odors from pets, cooking, and smoking, while the main particle filter removes airborne particles, like pollen, dust, pet dander, and more.

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Wirecutter Pick

Independently reviewed by the experts at Wirecutter, the Blue Pure 311 Auto ranks as one of Wirecutter's top air purifier picks for 2020. Featured in Wirecutter's "The Best Air Purifier" article for "Delivering exceptional performance in an attractive form".

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The secret behind powerful filtration

Our unique combination of electrostatic and mechanical filtration that we call HEPASilent™ filtration technology sets us apart. The combination allows us to use filters that are less dense than traditional True HEPA filters without a loss in performance— resulting in quiet and energy-efficient air purifiers.

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Verifide® by the Association of Home Appliance Manufacturers (AHAM) for performance and Clean Air Delivery Rate (CADR).

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Rated as an energy-efficient air purifier by the EPA's ENERGY STAR® rating program.

Blueair 67Intertek Sustainability Verified Zero Ozone logo : Verified Zero Ozone by Intertek Sustainability. Meets UL 2988 and does note emilt mroe than 0.0005 PPM as tested per UL

Verified Zero Ozone by Intertek Sustainability. Meets UL 2988 and does note emit more than 0.0005 PPM as tested.

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Certified by the California Air Resources Board for meeting the ozone emissions limit.

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Captures 99.9% of SARS-COV-2 (COVID-19)

Blue 211+ Auto

Blue Pure 211+ Auto was tested in a 13ft³ test chamber. Performance may vary depending upon the room size and location of the device within the room, quantity of particulates in the air, and product use pattern (operational settings and use duration, etc.). Not proven to prevent/reduce transmission of COVID-19.

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Performance

put to the test​


Performance put to the test​

How does Blueair compare

when tested against our

competitors?

Performance

put to the test​


Performance put to the test​

How does Blueair compare

when tested against our

competitors?

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LED air quality display

Stay up to date on the status of your indoor air with the LED air quality indicator (AQI). The display changes color to indicate good, moderate, or poor based on the current concentration of fine particles (PM2.5) measured by the integrated particle sensor. 

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One-button design

Forget about adjusting settings and knobs - a single button controls it all and lets you know when it's time to replace the filter. After about 7 seconds, the button's LED light automatically dims to 0% brightness.

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Easy filter change

The built-in LED warning system glows red when it's time for a change. For optimal performance, we recommend replacing the filter about every 6 months when used 24 hours a day.

  • 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
  • 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 Pure 411 Auto?

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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From Wirecutter, ©2020 The Wirecutter, Inc., All rights reserved. Used under license