Blue Pure 121

Extra-large spaces
Blue Pure 121
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Compact yet powerful. One button operation. Advanced, ultra-quiet filtration. Just plug this powerful performer in, and let the good air flow.

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Cooking odors
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Pet dander & odors
Extra-large spaces, extra fresh air

Filters the air in a 620 ft² space in about 12.5 min¹ (4.8x an hour, based on AHAM recommended removal rate) or up to 2,976 ft² in one hour on high speed to effectively lower particle levels and maintain a comfortable environment in large open spaces like studios, basements and open-concept floorplans.

Blueair Blue auto 121 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.² 

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

Blueair 121 coming apart 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 clean air faster and more quietly than traditional HEPA filtration alone.²

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Complete control with a single button

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

Blueair Examples of pre-filter colors for 121 air purifier
Up to five colorful fabrics to play with

Easily customize your air purifier to blend in or stand out with up to five washable pre-filter fabric colors. Dark Shadow and Diva Blue are included.

Blueair Graphic showing 360 degree filtration from Blue Pure 121
Easy to place

A 360-degree air intake means you can place the 121 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 31 dB on its lowest speed, and no louder than a 56 dB rainfall on its highest speed.

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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Low energy consumption

ENERGY STAR rated for best-in-class efficiency. This certified air purifier is 40% more energy-efficient than standard models, and uses less energy than the average LED lightbulb3 (about 10W). 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 main filter by catching large particles. Its fabric can be vacuumed or put in a washing machine for easy cleaning.

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Filter replacement indicator

Never worry about guessing when to replace your filter. A built-in LED filter lifetime indicator glows red when you are due for a replacement. Subscribe to our filter club for auto-replenishment every 6 months for optimal performance.

  • Wi-Fi connectivity for remote control
  • On/off timer
  • Filter replacement indicator
  • Speed control options
    1 - 2 - 3
  • Wheels
  • Integrated air sensors
Inlcuded in the box
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Blue Pure 121 air purifier
Blueair In the box - 121 carbon and particle filter
Combination Particle + Carbon Filter
Blueair In the box- Washable 121  pre-filter in DArk Shadow
Washable pre-filter in Dark Shadow
Blueair In the box - washable prefilter in diva blue for blue pure 121
Washable pre-filter in Diva Blue
Blueair IN the box - Instruction manual 211+ auto
Instruction manual
  • Dimensions(HxWxD)
    28.3 x 13 x 13 in
  • Product weight
  • Energy consumption
    31 - 61 W
  • Sound level
    31 - 56 dB(A)
  • Air outlet
  • Air inlet
  • Recommended room size
    620 ft2
  • Air changes per hour (ACH)
  • Clean air delivery rate (CADR) - Pollen
    400 cfm
  • Clean air delivery rate (CADR) - Dust
    400 cfm
  • Clean air delivery rate (CADR) - Smoke
    400 cfm

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 211+?

The 211+ model has many similar features, but the 121 is recommended for an extra larger room size of up to 620 square feet.

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.

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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. 


²Tested on E.coli, Influenza A (H1N1) with a minimum reduction rate of 99.9% in 60min 

³Comparing CADR performance of Blueair models with mechanical and electrostatic filtration vs same models with only H13 HEPA mechanical filtration. When similar CADR was measured, Blueair models with mechanical and electrostatic filtration achieved less noise with less energy than same models with only H13 HEPA mechanical filtration. 

*Tested on  E.Coli, Influenza A (H1N1), A.niger with minimum reduction rate of 99.9% in 60min.