Blue Pure 311 Auto
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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.
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 large spaces like primary bedrooms and playrooms.
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.
Only Blueair air purifiers use HEPASilent™ technology which provides maximum filtration with minimum noise. This dual filtration technology pioneered by Blueair combines electrostatic charging of particles and mechanical filtration using a unique filter design. Blueair air purifiers, therefore, produce more² clean air faster, cleaning your air quicker and much more quietly³ than traditional HEPA air purifiers.
*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.
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.
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.
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.
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.
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*
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.
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.
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.
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.
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.
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 controlNo
Filter replacement indicatorYes
Speed control optionsAUTO- 1-2-3
Integrated air sensorsYes, particle sensor
Items packaged individually within box - please read manual for set-up instructions.
Filter TypeParticle 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
Energy consumption3-35 W
Sound level23-53 dB(A)
Filter recyclingPlastic. Check your local recycling requirements for carbon.
Recommended filter change6 months (4,380 hours) when used 24 hours a day
Recommended room size388 ft2
Air changes per hour (ACH)4.8
Clean air delivery rate (CADR) - Pollen244 cfm
Clean air delivery rate (CADR) - Dust250 cfm
Clean air delivery rate (CADR) - Smoke250 cfm
Number of filters1
Guarantee clean air for years to come with up to 2-years of warranty coverage when you register your air purifier.
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).
Press and hold down the LED button for 10 seconds to reset the replacement filter indicator.
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.
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.
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.
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).
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.
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.
²Based on testing of particle CADR (GB/T18801-2015, particle size >0.3µm) in a HEPASilentTM /HEPASilent UltraTM unit at the same fan speed, compared to using H13 true HEPA filtration in the same unit.
³Based on testing of noise levels (dB, according to ISO 3743) in a HEPASilentTM /HEPASilent UltraTM unit with the same particle CADR.