Blueair Blue Pure 211i Max

Large open rooms

Suits up to 615 sq ft (57 m²)Smoke CADR of 410, times 1.5. That's AHAM's two-thirds rule, for an 8 ft ceiling. The sizer tests your main room, which it takes as a third of your floor area, capped at 500 sq ft.

$349Checked November 2, 2026. Abt price; no dated sale shown.

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My short take

Listed smoke CADR is 410, with noise from 23 to 53 dB. It weighs 16.2 lb and has no wheels.

See it in Best air purifiers by room size

The specs

CADR smoke (rated): 410 cfm
CADR pollen (rated): 410 cfm
Coverage at 4.8 air changes per hour (rated): 635 sqft
Noise, top speed (rated): 53 dB
Weight: 16.2 lb
ENERGY STAR: Certified, per vendor listing

Where these numbers came from

Abt product page

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Side by side

Blueair Blue Pure 211i Max vs Blueair Blue Signature