Blueair
Blue Pure 311i Max Air Purifier
$229.00
Amazon US detail page verified 2026-09-22; exact model and variant matched to ASIN B0BN2LZ9JH. Positioning: Medium room / smart.
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Specifications
| positioning | Medium room / smart |
| air quality sensors | PM or particulate sensor on sensor-equipped variants |
| app control | Yes (Blueair app, Alexa, Google Home) |
| auto mode | Yes on smart/sensor variants; otherwise no |
| cadr | 283 smoke / 314 dust / 365 pollen CFM |
| filter lifespan | Typically 6-12 months; follow filter indicator |
| filtration technology | Pre-filter + particulate filter + activated carbon (variant-dependent) |
| noise | 23-50 dB |
| power consumption | Model-specific; ENERGY STAR or manufacturer rating where applicable |
| recommended room area | 439 sq ft at 4.8 ACH |
| replacement filter cost | Varied by model; verify current genuine replacement |
