Blueair
Blueair Blue Pure 211i Max
$244.99Cheaper
Released 2022
Best Air Purifiers · head-to-head
Blueair Blue Pure 211i Max vs Alen BreatheSmart 75i
A sourced, side-by-side comparison. Blueair Blue Pure 211i Max is cheaper at $244.99. Every spec and price links to its source.
Alen
Alen BreatheSmart 75i
$799
Which is better: the Blueair Blue Pure 211i Max or Alen BreatheSmart 75i?
On the specs we track, they're closely matched. The Blueair Blue Pure 211i Max is the cheaper at $244.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Blueair Blue Pure 211i Max | Alen BreatheSmart 75i |
|---|---|---|
| US price | $244.99 | $799 |
| Brand | Blueair | Alen |
| Released | 2022 | — |
| Cadr smoke (CFM) | 443 | — |
| Coverage (sq ft) | 674 | 1400 |
| Hepa | Yes | Yes |
| Filter type | HEPASilent dual filtration (mechanical + electrostatic) + Activated Carbon, 4-layer | Advanced Particle filter + Medical-grade True HEPA (H13) + Ionizer (switchable); optional Carbon layer (Fresh/Ultimate filters) |
| Noise db min | 23 | 25 |
| Smart | Yes | Yes |
| Energy star | Yes | Yes |
| Release | 2022 | — |
Sources — Blueair Blue Pure 211i Max: blueair.com (verified 2026-06-15). Alen BreatheSmart 75i: alen.com (verified 2026-07-07).
What's the difference between the Blueair Blue Pure 211i Max and Alen BreatheSmart 75i?
Where the two actually differ on the specs we track (3 of 7). Matching specs are omitted.
- Coverage (sq ft): Blueair Blue Pure 211i Max 674 vs Alen BreatheSmart 75i 1400
- Filter type: Blueair Blue Pure 211i Max HEPASilent dual filtration (mechanical + electrostatic) + Activated Carbon, 4-layer vs Alen BreatheSmart 75i Advanced Particle filter + Medical-grade True HEPA (H13) + Ionizer (switchable); optional Carbon layer (Fresh/Ultimate filters)
- Noise db min: Blueair Blue Pure 211i Max 23 vs Alen BreatheSmart 75i 25
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Blueair Blue Pure 211i Max
Only one whitelisted tester, Wirecutter, published hands-on measured results for this exact model, naming it their large-room upgrade pick. Wirecutter found it a stellar, quiet, energy-efficient large-room performer (>99.9% smoke reduction), with a durability caveat on the washable fabric cover. (1 sourced review, 1 lab-tested.)
Praised: Stellar large-room particle/smoke reduction (>99.9% in the 30-minute test); Very quiet for its power (<=41 dBA on its four lower speeds); Energy efficient (41 W max; 11-18 W in normal everyday use).
Flagged: Fabric cover looks shaggy over time and lost elasticity after a few washes, needing replacement; Shorter filter replacement cycle (6-9 months vs a typical year); Relatively high price and overkill for small-to-medium rooms.
Alen BreatheSmart 75i
Two whitelisted hands-on reviews (TechHive 2023, TechRadar 2024) cover this exact model. Both are qualitative with no lab-measured numbers. Both praise the powerful airflow for very large rooms (up to ~1,300 sq ft), the swappable colored front panels, and simple onboard controls that work without the app. Both flag the high price, being overkill for small spaces, loud higher/auto fan speeds, bulk, and an app that is hard to find or unintuitive. They split sharply on setup and framing. (2 sourced reviews.)
Praised: Powerful airflow suited to very large rooms (up to ~1,300 sq ft); Swappable colored front panels to match decor; Simple onboard controls, usable without the app.
Flagged: Very expensive and overkill for small spaces; Gets loud at higher/auto fan speeds; Large, bulky footprint.