Blueair
Blueair Blue Pure 311i Max
A
Ranked #3 in Air Purifiers
Backed by 4 cited sources
Covered by 4 outlets
The best mid-size smart purifier: HEPASilent tech delivers class-leading particle capture with an almost imperceptible 22-23 dB sleep mode at around $229. Only a faint buzz at max speed and non-washable fabric pre-filters keep it out of S.
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Key features
- ✓ HEPASilent dual filtration, top-tier particle capture
- ✓ 22 dB sleep mode - near silent
- ✓ Wi-Fi, auto mode and app control
- ✓ Very low energy draw
- ✓ ~$229 typical price
The sources behind this ranking
4 cited sources cover Blueair Blue Pure 311i Max. Here's the stance each one takes.
S 1 A 3
R 
Reviewed Named the best air purifier - best particle filtration of any unit they tested. S Read → H 
HouseFresh Powerful and energy-efficient; clears a medium room in about 10 minutes. A Read → T 
TechGearLab Highly rated in lab testing; strong cleaning performance for under $300, minor buzzing at max speed. A Read → C 
Consumer Reports Tested and rated among CR's recommended air purifiers. A Read →