What to know about Blueair Blue Pure 211i Max
Why it stands out
Why we like it
It costs roughly $90 less than the SP4i. RTINGS comparison data gives about 33.9 dBA on low. Retailers state it is CARB-certified and Zero Ozone Verified.
What to know
Score breakdown
Independently measured noise on low or sleep speeds (HouseFresh, Tom's Guide, RTINGS) and how much clean air the unit delivers at a sleep-tolerable level, roughly 45 dB or less. Brand dB claims count for less.
AHAM CADR and 4.8 ACH room rating versus a typical 150–400 sq ft bedroom, plus independent smoke and particle test results.
Dedicated sleep or night mode, display that turns off or dims via a light sensor, no light leakage or beeps, auto mode that doesn't ramp up abruptly overnight, timer.
No ionizer, or one that can be switched off; CARB or zero-ozone verification; true mechanical HEPA versus electrostatic filtration; recalls or labelling disputes.
Annual filter cost, filter life, energy use, availability of genuine filters, warranty.
Street price relative to quiet cleaning delivered for a bedroom.
Blueair Blue Pure 211i Max specs
Buying workflow
- Workflow type
- Extra Large Room
Noise
- Lowest-speed noise (manufacturer)
- 23 dB
- Top-speed noise (manufacturer)
- 53 dB
- Lowest-speed noise (independent measurement)
- 33.9 dBA
- Quiet Mark certified
- Yes
Performance
- CADR (smoke where given, else headline)
- 435 cfm
- Recommended room size (4.8–5 ACH / AHAM)
- 674 sq ft
Running cost
- Max power draw
- 46 W
- Main filter life
- 9 months
Sleep features
- Sleep / night mode
- Yes
- App control
- Yes
Health & materials
- Ionizer / electrostatic stage
- HEPASilent (electrostatic charging + mechanical filtration)
- Filter type
- HEPASilent particle + carbon filter, washable fabric pre-filter
Compare prices
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Prices and availability may change. The retailer's price and availability at checkout govern the transaction.
| Retailer | Price | Availability | |
|---|---|---|---|
| AmazonLowest | $309.99 $349.99 | In Stock | View deal |
Based on 6 retailer price observations captured during the last 90 days.