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Blueair Blue Pure 511i Max

Ranked #4 of 24 in Best Bedroom & Small-Room Air Purifiers: Quietest Levoit, Coway, Blueair & Winix (2026). Here is every spec we scored, where it came from, and how it compares.

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#4

Blueair Blue Pure 511i Max

Best for: A 4.2 lb nightstand-size purifier

6.8/10

What we like

  • 9 CFM per watt
  • 4.2 lb

Watch out for

  • 9-month filter

Score breakdown

Quietest setting 30%
Smoke CADR 25%
Loudest setting 15%
CADR per watt 10%
Carbon or odor stage included 10%
Main filter life 10%
Quietest setting19 dB
Smoke CADR153 CFM
Loudest setting48 dB
CADR per watt9 CFM/W
Carbon or odor stage includedYes
Main filter life9 months
CADR (smoke / dust / pollen)153 / 159 / 174
Recommended room237 ft² (4.8 ACH)
FilterParticle + carbon
Filter lifeUp to 9 months (RealTrack)
Noise19–48 dB
Power17 W
Weight4.2 lb
PriceCheck price
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Specs source:

Blueair Blue Pure 511i Max head-to-head

Head-to-headBlueair Blue Pure 511i Max vs Levoit Vital 100S

How it compares

Open the full comparison table

Coway Airmega Halo
7.6/10
#1 · 17.8 dB in sleep mode, Energy Star
Blueair Blue Pure 411i Max
7.2/10
#2 · 19 dB on low, 46 dB on high
Coway Airmega Mighty2 (AP-1512N)
7.1/10
#3 · The Mighty's successor with a laser PM sensor
Blueair Blue Signature Small
6.7/10
#5 · The smallest Signature, 160 CFM
Blueair Blue Pure Mini Max
6.3/10
#6 · A 2.8 lb desk or nursery purifier
Levoit Eleva 300X
6.2/10
#7 · 20 dB sleep mode with separate HEPA and carbon filters
Coway Airmega 150
6.0/10
#8 · A slim 153 CFM purifier, 6.5 in deep
Coway Airmega Mighty2 Mini
5.9/10
#9 · A compact Mighty with 143 CFM
Coway Airmega 100
5.5/10
#10 · A 108 CFM bedroom unit with a 1-year 3-in-1 filter
Coway Airmega AP-1512HH Mighty
5.5/10
#11 · The original Mighty: 233 CFM smoke
Rabbit Air BioGS 2.0
5.2/10
#12 · Rabbit Air's 4-stage bedroom model
Levoit Vital 100S
5.1/10
#13 · A 143 CFM purifier with HEPA-grade sleep mode
Levoit Sprout
4.8/10
#14 · A nursery purifier with ambient sounds and soft lighting
Winix T500
4.8/10
#15 · A 162 CFM Wi-Fi purifier with a 12-month carbon filter
Blueair Mini Restful
4.7/10
#16 · A purifier with a sunrise alarm clock
Levoit Core 300S
4.7/10
#17 · A compact 141 CFM Levoit at 23 W
Winix A230
4.6/10
#18 · A simple 360° purifier with no app
Levoit Core 200S
3.7/10
#19 · A 90 CFM purifier with a night light
Levoit Core Mini
3.3/10
#20 · A 2.2 lb desk purifier with aroma pads
Honeywell Allergen Plus AQSense HPA125
1.3/10
#21 · An Energy Star purifier for rooms up to 110 sq ft
Shark BreatheClear Compact Pro (HP062)
1.2/10
#22 · A small purifier with motion sensing and a 6-year filter
Shark NeverChange Air Purifier (HP152)
1.2/10
#23 · A 5-year-filter purifier for up to 650 sq ft
Molekule PECOAir
1.1/10
#24 · Molekule's PECO-HEPA purifier for bedrooms and offices