Blueair Blue Pure 211i Max review

The Blue Pure 211i Max is the purifier for big rooms that does not cost IQAir money. Blueair publishes a CADR of 435 for smoke, 452 for dust and 450 for pollen and recommends it for 674 sq ft at 4.8 air changes per hour, close to double the Coway Airmega Mighty. Blueair notes these figures were updated to new DOE standards. It reaches that with a mix of mechanical and electrostatic filtration, which Blueair says achieves less noise with less energy than HEPA alone, and the spec sheet backs that up with a 23 to 53 dB range and 46 W draw. The filter lasts up to 9 months, and the RealTrack algorithm turns the LED red or sends an app alert when it is due. The list price is $349.99, but the store showed $227.49 when we checked, and Blueair offers a 30-day home trial. Register the unit and the 1-year warranty becomes 3 years. Expect to replace the filter more often than with Coway's yearly HEPA.

Who it is for

open living rooms up to 674 sq ft

Price

$349.99 list; $227.49 on sale when checked.

Blue Pure 211i Max $349.99 $227.49
Quoted from the vendor pricing page on November 13, 2026.

Key features

• CADR of 435 smoke, 452 dust and 450 pollen
• Recommended room size of 674 sq ft at 4.8 air changes per hour
• Sound level of 23 to 53 dB
• 46 W energy consumption
• Filter lasts up to 9 months, tracked by the RealTrack algorithm and the Blueair app

Strengths and weaknesses

• Strength: Highest CADR on this list for the price, at 435 for smoke
• Strength: Low 46 W power draw for its size
• Strength: Registering extends the 1-year warranty to 3 years
• Weakness: The $349.99 list price is well above the Coway and Winix when not on sale
• Weakness: Filter life tops out at 9 months, shorter than Coway's 1-year HEPA rating
• Weakness: Blueair lists several filter types and prices, so check which fits before ordering

Key facts

• CADR (smoke/dust/pollen): 435 / 452 / 450
• Room size: 674 sq ft at 4.8 ACH
• Noise: 23 to 53 dB
• Filter life: Up to 9 months
• Warranty: 1 year, 3 years when registered

Where it ranks

Blueair Blue Pure 211i Max is No. 3 in our Best Air Purifiers verdict.