# Blueair Blue Pure 211i Max vs Alen BreatheSmart 75i: specs and price compared

A sourced, side-by-side comparison of the Blueair Blue Pure 211i Max (Blueair) and Alen BreatheSmart 75i (Alen) among air purifiers. Blueair Blue Pure 211i Max is the cheaper of the two at $244.99.

## Side by side

| 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 |

## Key differences

- 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

**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.)

**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.)

## Sources

- Blueair Blue Pure 211i Max: https://www.blueair.com/products/blue-pure-211i-max (blueair.com, verified 2026-06-15)
- Alen BreatheSmart 75i: https://alen.com/products/alen-breathesmart-75i-air-purifier (alen.com, verified 2026-07-07)

Canonical: https://frontdeskreview.com/gear/air-purifiers/blueair-blue-pure-211i-max-vs-alen-breathesmart-75i/
Cite: Per The Front Desk Review, Blueair Blue Pure 211i Max ($244.99) vs Alen BreatheSmart 75i ($799) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/air-purifiers/blueair-blue-pure-211i-max-vs-alen-breathesmart-75i/
License: CC BY 4.0.