#6
Product Review · Air Purifiers · #6 Ranked
Blueair 511i Max
Air purifiers — small-room smart HEPASilent · Reviewed by Katie · amazon.com live, Sept 9 2026
81
Solid Buy
Rank #6 of 10 · Air Purifiers
$99.99
The verdict
Why it scored a 81
At $99.99 the Blueair 511i Max is a small-room smart purifier from Consumer Reports' top-rated air-purifier brand for 2025. Value leads at 85 and Reliability at 89: it is the quietest unit here at 19 dB on low, weighs 4.2 lb, and adds Wi-Fi, auto mode and a PM2.5 readout at a manual-control price. Quality sits at 75 because HEPASilent pairs electrostatic charging with lower-grade media rather than true HEPA, and the small carbon load is weak on odors; the 1-year base warranty (3 registered) holds Warranty at 78. It is for a bedroom or office where silence and app control matter more than cooking smells.
Key specs
What you're getting
- CADR 174 pollen / 159 dust / 153 smoke CFM
- 237 sq ft recommended room; cleans 569 sq ft in 30 min
- 19 dB on low to 48 dB on high, the quietest here
- Particle & Carbon filter $44.99, up to every 9 months (~$60/yr)
- Washable fabric pre-filter, available in colors
- 17 W; 4.2 lb; 14.5 x 9.3 x 9.3 in
- Wi-Fi + Blueair app: auto mode, night mode, PM2.5 readout, Alexa/Google
- HEPASilent (electrostatic + media, not true HEPA); 1-yr warranty, 3 registered
ViperScore breakdown
FactorScoreWeightPoints
Value85×25%21.2
Quality75×20%15.0
Features70×15%10.5
Reliability89×15%13.3
Satisfaction88×15%13.2
Warranty78×10%7.8
Weighted total81
At a glance
- CADR 174 pollen / 159 dust / 153 smoke CFM
- 19 dB low to 48 dB high; 17 W, 4.2 lb
- 237 sq ft room; $44.99 filter up to every 9 months
- Price$99.99
- TierAir purifiers — small-room smart HEPASilent
- Category rank#6 of 10
Katie
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