Blueair Blue Pure 211i Max review

The Blue Pure 211i Max is the pick for big bedrooms. Blueair rates it for 674 square feet at 4.8 air changes per hour, with a CADR of 450 cfm for pollen, 452 for dust and 435 for smoke, which is far more air than a typical bedroom needs. That headroom is the point: in a normal room it can sit on a low setting that Blueair puts at 23 dB, and it tops out at 53 dB on high. Speed options run from 1 to 4 plus Auto and Night, and three sensors adjust the fan as the air changes. The app tracks filter life, which Blueair puts at up to 9 months. Blueair offers a 30-day home trial and extends the 1-year warranty to 3 years when you register. The downsides are price and size: $349.99, and a 16.2 lb body that needs floor space.

Who it is for

Large primary bedrooms and open sleeping areas that need fast cleaning at a low fan speed.

Price

$349.99 on the Blueair US store when checked.

Blue Pure 211i Max $349.99
Quoted from the vendor pricing page on November 8, 2026.

Key features

• HEPASilent dual filtration that Blueair says removes 99.97% of airborne particles
• Published sound level of 23 to 53 dB
• Speed settings 1 to 4, Auto and Night
• Rated for 674 square feet at 4.8 air changes per hour
• Three sensors that adjust speed automatically, plus app filter alerts

Strengths and weaknesses

• Strength: Largest room rating among the mid-priced picks
• Strength: CADR of 435 to 452 cfm lets it run slowly in a bedroom
• Strength: 30-day home trial and a warranty that extends to 3 years with registration
• Weakness: $349.99 is more than twice the Levoit
• Weakness: Large body at 22.7 x 14.4 x 14.4 inches and 16.2 lb
• Weakness: Filter subscriptions are pushed hard on the store page

Key facts

• Price: $349.99
• Sound level: 23 to 53 dB
• Room size at 4.8 ACH: 674 sq ft
• CADR: Pollen 450, dust 452, smoke 435 cfm
• Filter life: Up to 9 months

Where it ranks

Blueair Blue Pure 211i Max is No. 2 in our Best Quiet Air Purifiers verdict.