Blue Pure 511

Small spaces
Blue Pure 511
Includes a washable pre-filter in Arctic Trail
Customize your purifier
Buy additional pre-filters to match your space
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Let’s clear the air with the touch of a button

Our latest and smallest addition to the Blueair family. Introducing Blue Pure 511, our most compact, lightweight, yet efficient air purifier. Blue Pure 511 combines simplicity and performance for maximum filtration¹ and minimum noise2 at the touch of a button.

Our unique HEPASilent™ technology, combines electrostatic and mechanical filtration to capture at least 99.97% of airborne particles down to 0.1 micron in size².

Blueair Flower
Blueair Cooking odors
Cooking odors
Blueair Dust
Blueair Pets
Pet dander & odors
Blueair Mold
Blueair Bacteria & viruses
Bacteria & viruses*
Blueair Smoke
Blueair Chemicals
Cleans your air in a matter of minutes

180 ft² (AHAM) in 12.5 minutes or up to 432 ft² in 30 minutes.

Blueair Blue pure air purifier graphic with room sizing
One-button control

Press once for Night mode, twice for Everyday mode, and three times for Boost mode.

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Blueair Person in bed next to blueair air purifier
Compact for fresh, clean air anywhere

Small but mighty, the Blue Pure 511 is perfect for dorms, nurseries, and small home offices.

Blueair Person in home gym next to air purifier
Powerful yet whisper-silent
New and longer lasting filters (6-9 months)

The Blue Pure 511 operates on low at 24 dB (quieter than a whisper, and 49 dB (normal conversation) on high.

Blueair Blue pure max pre-filter color array
Customizable design
Designed with the sleek & stylish look of Scandinavian design

Our three Scandinavian inspired washable pre-filters are designed to seamlessly blend into your home.

Our pre-filters extend the life of primary filters, catching large airborne particles such as dust, lint, pollen, and pet hair.

Independently proven performance
Blueair Image
Verifide(R) for performance and Clean Air Delivery Rate (CADR).
Blueair Quiet Mark Certified
Quiet Mark Certified
Blueair Energy star logo
Rated as energy-efficient air purifiers.
  • On/off timer
  • Speed control options
    1 - 2 - 3
  • Integrated air sensors
Inlcuded in the box
Blueair Image

Blue Pure 511 air purifier with pre-filter in Arctic Trail

Blueair Filter

Blue Pure 511 Filter

Blueair IN the box - Instruction manual

Instruction Manual

  • Dimensions(HxWxD)
    13.4 X 7.9 X 7.9 in
  • Product weight
  • Energy consumption
    2-16 W
  • Sound level
    24-49 dB
  • Air outlet
  • Recommended room size
    182 - 432 ft2
  • Air changes per hour (ACH)
  • Clean air delivery rate (CADR) - Pollen
    112 cfm
  • Clean air delivery rate (CADR) - Dust
    112 cfm
  • Clean air delivery rate (CADR) - Smoke
    112 cfm
  • Number of filters
How does this model differ from the Blue Pure 411?

Key upgrades include: more coverage, quieter on highest fan, & smaller compact size.

How do I register for warranty?

To extend the Limited Warranty from one year to three (3) 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.​

Read full warranty terms here

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.

Related products


¹Comparing pollen CADR on high fan speed (Blue Pure 411a Max & 411i Max vs. Blue 411 Auto), other units may vary. Based on AHAM maximum allowable certified rating which may vary from the AHAM seal claimed valued. 

²Noise refers to the dB(A) difference in acoustic power.

³Sound pressure at max. fan Assuming 635 sq.ft room size and 4.8 air exchanges per hour (AHAM AC-1)

⁴Quietest refers to eligibility for Quiet Mark certification, limited to 10-20% of quietest products. See for further information

*Tested PM 2.5 (0.1 - 2.5 microns) up to 90min in a 30m³ room. Tested to remove min. 99.9% of S. aureus, K. pneumoniae, P. aeruginosa, MS2, E.Coli, H1N1, A.Niger.