Blueair Blue Pure 211i Max: Specs, Price, Pros & Cons
This review measures the Blueair Blue Pure 211i Max against the full 22-spec sheet we track for Air Purifiers, comparing it like for like with the 31 other models in our database. It earns a VS Score of 61 out of 100 — the weighted result of every verified specification measured against the class average.
On the spec sheet it is strongest in performance and weakest in filtration. Its clearest single advantage over the class average: a much higher CADR (smoke) — 435 CFM vs 212.72 CFM (avg). Street prices currently start at $ 349 for the Blueair Blue Pure 211i Max.
Category strengths
Where the Blueair Blue Pure 211i Max beats the average
- A much higher CADR (smoke) ?435 CFM vs 212.72 CFM (avg)
- A much higher coverage area ?674 sq ft vs 333.52 sq ft (avg)
- Has washable pre-filter ?
- Has app control ?
- Has air quality sensor ?
- Has voice assistant ?
- Has auto mode ?
- More filtration stages ?4 vs 3.56 (avg)
- Has activated carbon filter ?
- Has timer ?
Where the Blueair Blue Pure 211i Max trails the average
- No true HEPA filter ?
- A lower filter life ?9 months vs 16.24 months (avg)
- A heavier build ?7.35 kg vs 5.29 kg (avg)
- A slightly higher min noise level ?23 dB vs 22.26 dB (avg)
- A slightly higher max noise level ?53 dB vs 51.74 dB (avg)
Editor’s note
The 211i Max is Blueair's most powerful Blue Pure, and it is built for exactly one problem: a big, open space that smaller purifiers only pretend to cover. The honest capacity figure – Blueair's own AHAM-basis number, and it matches the 435 smoke CADR arithmetic precisely – is 674 square feet at nearly five air changes an hour. The '3,000 sq ft' in the marketing is a one-air-change-per-hour stretch; ignore it, and know that 674 real square feet is still more than almost anything else in this price bracket delivers.
What makes it liveable at that output is the noise curve. 23 dB on low is bedroom-quiet from a machine nearly two feet tall, and 53 dB flat out is moderate for the airflow involved. The sensor package is Blueair's best – PM1, PM2.5 and PM10, where most of the range reads PM2.5 only – feeding a proper auto mode, and this model does support Alexa and Google Home, which its smaller sibling does not advertise.
The trade-offs are characteristically Blueair. HEPASilent is electrostatic-plus-mechanical filtration – genuinely effective, but not a certified True HEPA class, which matters to some buyers on principle. Consumables are big-machine priced: $69.99 for the standard nine-month filter, more for the specialised SmokeBlock and AllergenBlock variants, plus a washable fabric pre-filter. And it is a large object – 22.7 inches tall and over 16 pounds – that needs floor space to breathe.
At $349.99 it competes with Coway's Airmega 400S and Levoit's Core 600S. The Levoit moves comparable air for less money; the Blueair answer is quieter operation, the three-size particle sensor and considerably better looks. For an open-plan living space that the family actually sits in, those are the right priorities.
Specifications
Quality bars are generated automatically against 31 other air purifiers.
Performance
Clean Air Delivery Rate — how quickly smoke particles are scrubbed from the air.
The room size the purifier is rated to clean effectively.
How many times the air in the rated room is cycled each hour.
The number of filtration layers air passes through.
Filtration
A certified HEPA filter captures 99.97% of 0.3-micron particles.
The HEPA grade of the main filter (e.g. H13).
A carbon layer absorbs odours, smoke and VOCs.
Pellet-based carbon beds absorb more odour than thin coated sheets.
A rinseable pre-filter catches hair and large dust to extend filter life.
How long the main filter lasts before replacement.
Noise & power
The lowest-speed noise output; quieter suits bedrooms.
Noise at full speed; lower is better.
Maximum power draw; lower costs less to run continuously.
A dimmed, near-silent mode for overnight use.
Design
A lighter unit is easier to move between rooms.
The height of the unit.
Smart features
Measures particle levels to show and react to air quality.
Adjusts fan speed automatically based on measured air quality.
Control and monitor it from a phone app.
Works with Alexa and Google Assistant.
Tells you when the filter needs replacing.
Schedule the purifier to switch off automatically.
How the VS Score works — and what it can’t tell you
Every measurable spec is scored against the average of all the Air Purifiers we track: matching the class average scores 50, clearly beating it climbs towards 100, and each spec counts according to an editorial weight that reflects real-world impact — a battery-capacity gap moves the score far more than a colour-options list. The quality bars on the spec cards above show where this model sits inside the full range for its class, and the overall VS Score rolls every weighted result into one number.
Unknown values are never estimated. A spec this product doesn’t report simply drops out of its scoring — it isn’t penalised with a guess — but a thinner spec sheet does mean a score built on fewer data points, which is why completeness is disclosed under About this data.
Most importantly: a spec-sheet lead is not the same as a better product. Megapixels, gigahertz and benchmark points describe capacity, not experience — image processing, software optimisation, thermals, haptics and ergonomics decide how a device actually feels, and no table captures reliability or long-term support quality. Treat the VS Score as a structured summary of what can be measured, not a substitute for your own priorities.
About this data
- Specifications are compiled from each manufacturer’s official spec sheet, cross-checked against trusted specification databases, and normalised into one schema so identical things are compared identically.
- Specifications last verified August 19, 2026.
- Data completeness: 21 of the 22 specs in this category are verified (95%). Anything we could not verify is shown as Unknown — never estimated — and is excluded from the score.
- Prices and availability come from live retailer feeds via our shopping partners and refresh throughout the day; a missing price means no partner currently lists the product, not that it is discontinued.
- Want the full picture? Our editorial guidelines explain how we research products, weight the scores and stay independent.
- Spotted an error in a spec? Tell us and we will correct the sheet.
Where to buy
Prices and availability may change. Check the retailer before buying. We may earn a commission on purchases.
Price history
Air Purifiers with similar specs to the Blueair Blue Pure 211i Max
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The bottom line
The Blueair Blue Pure 211i Max earns a VS Score of 61, comfortably above average among the 32 air purifiers we compare here.
- Who it’s for
- Open-plan living spaces: a genuine 674 sq ft at 4.8 air changes, the range's best PM1/2.5/10 sensor, voice control, and a civilised 23 dB low.
- Who should look elsewhere
- Small rooms – it is 23 inches and 16 pounds of machine – and certified-HEPA purists, since HEPASilent is electrostatic-plus-mechanical by design.
- The trade-off that matters
- Big-space performance that stays pleasant to live with, funded by $70-90 filter cycles that cost more per year than some rivals' hardware.
- The main alternative
- Levoit Core 600S moves comparable air for noticeably less money; the Blueair's case is noise, sensors and looks rather than airflow per dollar.
The VS Score is generated automatically from the weighted specifications above, measured against all other air purifiers in our database. Treat it as a shortlisting guide — not a substitute for your own priorities.
