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Head-to-head · Best Air Purifiers

Blueair Blue Pure 211+ vs Blueair Blue Pure 311i Max

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Blueair Blue Pure 211+ comes out ahead by a narrow margin (4.3 vs 4.1). Blueair Blue Pure 211+ is best for: Buyers prioritizing simple operation and customizable aesthetics. Read the strengths below before deciding.

Blueair Blue Pure 211+
Higher ratedRanked #2 in Best Air Purifiers
Blueair Blue Pure 211+
3 sources$70as of Oct 10

The Blueair Blue Pure 211+ clears large rooms fast and stays quiet on lower settings, in a package that looks good doing it. A one-button design and washable pre-filter keep it simple to live with and cheap over time, though the unit is heavy and has no portability features. Two real drawbacks: you cannot disable the built-in ionizer, and filters cost notably more than competitors'.

Strengths
  • — Delivers 350 CFM CADR for dust, smoke, and pollen, effectively cleaning rooms up to 540 sq. ft.
  • — Runs at a measured 47.2 dB on low speed, which Garage Tested described as quieter than a refrigerator.
  • — Features a washable, customizable fabric pre-filter that captures large particles like pet hair and lint.
Watch-outs
  • — The built-in ionizer cannot be disabled, which may be a concern for users avoiding ionization technology.
  • — The unit is bulky and lacks handles or wheels, making it difficult to move between rooms.
  • — Filter replacement costs are higher compared to other air purifiers with similar performance.
$70 · Buy at sylvane.comFull review →
Blueair Blue Pure 311i Max
Ranked #4 in Best Air Purifiers
Blueair Blue Pure 311i Max
2 sources$169.99as of Oct 16

TechGearLab's best overall air purifier (80/100) and a 3.5/5 'Good' from PCMag: a light, quiet, app- and voice-controlled purifier for medium to large rooms that cleared smoke quickly in both outlets' tests. Its HEPASilent system relies on an always-on ionizer, and PCMag notes limited air quality readings and filter options.

Strengths
  • — Removed over 80% of particles in 10 minutes and had TechGearLab's 200 sq ft lab 99% clean by 27 minutes
  • — Cleared a 110 sq ft office from a PM2.5 reading of 200 to 0 in 14 minutes in PCMag's incense test
  • — Quiet: PCMag measured 52dB on high and 33dB on low
Watch-outs
  • — The HEPASilent system uses an always-on ionizer and is not a True HEPA filter, per TechGearLab
  • — TechGearLab found the child lock is not fully childproof
  • — PCMag notes limited air quality readings (PM2.5 only, no on-device numbers) and no application-specific filter options
$169.99 · Check Price on AmazonFull review →

How they stack up

Blueair Blue Pure 211+

The Blueair Blue Pure 211+ stands out with its washable fabric pre-filter and minimalist one-button control, offering a simpler user experience than the app-dependent Coway Airmega 400S or Levoit Core 400S. However, it forces users to accept a built-in ionizer that cannot be disabled, a feature absent in the Coway and Levoit models, and it is less portable than the compact Levoit.

Blueair Blue Pure 311i Max

PCMag points out that two 311i Max units cost about the price of one Dyson Purifier Cool TP07, which adds an oscillating fan and more detailed air quality readings. TechGearLab suggests the Levoit Core 400S (the 400S-P version it tested) as the ionizer-free, family-friendly alternative that is nearly as powerful.

Specs side-by-side

SpecBlueair Blue Pure 211+Blueair Blue Pure 311i Max
CADR350 CFM—
Room Coverage540 sq. ft.—
Noise Level37.2 dB—
Filtration SystemHEPASilent + Ionizer—
Dimensions20H x 13W x 13D inches19 x 12.5 x 12.5 in
Weight12.98 lbs—
Power Consumption54.5 watts—
Filter Lifespan6-8 months—
Listed CADR—Pollen 365 cfm, Dust 314 cfm, Smoke 283 cfm (TechGearLab)
Rated Room Size—Up to 929 sq ft in 30 minutes (PCMag)
Filtration—HEPASilent: pleated particle filter plus ionizer, carbon layer, washable fabric pre-filter
Measured Weight—7.3 lbs (TechGearLab)
Smart Features—Wi-Fi app, Amazon Alexa, Google Assistant
Replacement Filter—$44.99, up to nine months (PCMag)
Energy Star—Yes
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