Blueair Blue Pure 211i Max Air Purifier: CADR, Noise, Coverage & Specs
Last updated: Aug 22, 2026
Overview
Advanced air purifier for large rooms with HEPASilent technology and smart features.
CADR and room size
CADR (smoke): 435 CFM.
What room size is the Blueair Blue Pure 211i Max suitable for?
Recommended room size based on CADR: about 674 sq ft (CADR × 1.55).
Manufacturer claimed coverage: 3235 sq ft. This claim is higher than 3× CADR, so it is not used for ranking.
Filtration
What filter does it use?
HEPASilent.
Noise
How loud is it?
Minimum reported noise: 23 dB.
Smart features
Does it have Wi-Fi?
Yes — app or Wi-Fi features are listed.
Captures 99.97% of particles as small as 0.1 microns, RealTrack technology for filter lifetime tracking, WiFi connectivity with smart features
Specifications
- CADR (smoke)
- 435 CFM
- Recommended room size
- 674 sq ft
- Manufacturer claimed coverage
- 3235 sq ft
- Noise
- 23 dB
- Filter type
- HEPASilent
- Power
- 46
- Dimensions
- 22.7 x 14.4 x 14.4
- Weight
- 16.2
- Wi-Fi / app
- Yes
Comparisons
- FreAire B0HBJ3N8BD vs Blueair Blue Pure 211i Max
- Blueair Blue Signature vs Blueair Blue Pure 211i Max
- Blueair Blue Pure 211i Max vs Dreame AirPursue PM20
- Blueair Blue Pure 211i Max vs Medify Air MA-40
- Blueair Blue Pure 211i Max vs BLUEAIR Blue Pure 311i Max
- Blueair Blue Pure 211i Max vs Levoit Core P350-P
Methodology
Specifications are compiled from manufacturer documentation, product listings and other cited sources. See methodology.