Air Purifiers / Blueair
Blueair Blue Pure 211i Max (3613111100)
The highest verified CADR here, from a charged-media system you cannot switch to mechanical-only.
Overall score 7.7/10
Pros
- + 435 CFM AHAM Verifide smoke CADR — the most verified clean air of anything here at any price
- + 44W for that output is the best efficiency in this file by a wide margin
- + Blueair's own page leads with the honest 674 ft² at 4.8 ACH, not the 3,235 ft² retail headline
- + 23 dB minimum with real PM1/PM2.5/PM10 sensing driving auto mode
- + Washable fabric pre-filter doubles as the colour panel, so it costs nothing to maintain
Cons
- − The HEPASilent ion-charging stage cannot be turned off — CARB classifies the unit as an Electronic (ozone-capable) device and Blueair makes no ozone statement on the page
- − AHAM records the filter type as "Fabric": this is charged-media filtration, not a mechanical H13 element
- − The retail listing's "up to 3,235 Sq Ft" is Blueair's own 674 ft² multiplied by 4.8 — a 1-ACH number
- − 1-year warranty unless you register, and even then 3 years is short next to Honeywell's 5
- − $69.99–$89.99 filters at up to 9 months is $80–120/yr, twice the Coway's $54.99
Blueair Blue Pure 211i Max (3613111100) review: what the specs say
The highest verified CADR here, from a charged-media system you cannot switch to mechanical-only. At $349.99, Blueair's 2023 model sits in the middle of the range — the air Purifiers we compare run from $49.99 to $1,014.99. It scores 7.7/10 overall, calculated from published specifications across 8 categories rather than from a subjective impression.
Its strongest showing is Verified Clean-Air Delivery at 9.5/10 — how much air the unit actually cleans per minute, weighted heavily toward AHAM Verifide smoke CADR over manufacturer-published figures. Self-reported CADR scores below Verifide CADR, and 'no CADR published at all' scores below both. The weakest is Running Cost at 5.5/10, which is the trade-off to weigh before buying: if that is the specification you care about most, one of the alternatives below will serve you better.
Worth knowing before you buy: the HEPASilent ion-charging stage cannot be turned off — CARB classifies the unit as an Electronic (ozone-capable) device and Blueair makes no ozone statement on the page; and AHAM records the filter type as "Fabric": this is charged-media filtration, not a mechanical H13 element. Every specification on this page comes from Blueair's own documentation or a verified retail listing — where a figure is not published, the table says so rather than estimating it.
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Full Specifications
| AHAM Verifide CADR (Smoke / Dust / Pollen) | AHAM Verifide: smoke 435 / dust 453 / pollen 450 CFM (ahamdir.com, model 3613111100, listed as "Pure Blue 211i Max"). The highest Verifide CADR in this file. Note that AHAM records this model's filter type as "Fabric", not HEPA. CFM |
| AHAM Verifide Room Size (4.8 ACH) | 674 ft² (AHAM Verifide suggested room size at 4.8 air changes per hour) — and Blueair publishes exactly 674 ft² at 4.8 ACH on its own page ft² |
| Coverage Claim & Its Air-Change Basis | Blueair's own product page leads with "674 sq ft" and "4.8 air changes per hour", which is the correct figure correctly labelled. The retail listing title, by contrast, says "Large Rooms up to 3,235 Sq Ft" — that is 674 × 4.8, i.e. the 1-ACH number. Same product, two claims a factor of 4.8 apart. |
| Filter Grade (True HEPA / HEPA-Type / H13) | HEPASilent: a two-part system that electrostatically charges particles before a loosely woven fabric media collects them, plus activated carbon. Blueair claims 99.97% of airborne particles. It is not a mechanical H13 filter and AHAM logs the filter type as "Fabric" — the efficiency comes from the charging stage as much as the media. |
| Pre-Filter (Washable?) | Yes — washable textile pre-filter sleeve, which is also the unit's colour panel. Machine-washable, no recurring cost. |
| Filter Cost per Year | $79.99–$93.32/yr — Particle & Carbon Filter $69.99 ($59.50 on subscription) with Blueair's RealTrack algorithm calling replacement at up to 9 months, i.e. about 1.33 filters a year. The AllergenBlock variant is $89.99 ($76.50) and SmokeBlock $84.99 ($72.25), pushing it to $100–120/yr. |
| Ioniser / UV / PCO & CARB Classification | HEPASilent's ion-charging stage is integral to how the unit filters and CANNOT be switched off — unlike the Coway ioniser or Winix PlasmaWave, there is no button. CARB certifies the Blue Pure 211i Max as an ELECTRONIC device (Blueair AB, EO G-23-076, notified 2023-04-19), meaning ozone-capable and tested at or below 0.050 ppm. Blueair's product page makes no ozone statement at all. Every Blueair model in the CARB list is classified Electronic. |
| Noise, Lowest to Highest Setting | 23 dB lowest to 53 dB highest (Blueair published) dB |
| Air Quality Sensor | Genuine multi-channel particulate sensing: PM1, PM2.5 and PM10, feeding auto mode and the app's history. One of only three units here that resolve PM1. |
| Smart Features & Offline Operation | Wi-Fi and the Blueair app require an account. Fan speed, auto mode and night mode all work from the physical dial with no internet; filter tracking, air-quality history and scheduling do not. |
| Power Draw & Annual Energy | 46W (Blueair published); AHAM-measured 44.0W at the smoke-CADR speed and 256 kWh annual energy consumption. That is 435 CFM of smoke CADR for 44W — comfortably the best clean-air-per-watt here. |
| Warranty Terms & Conditions | 1-year standard, extended to 3 years only if you register the product |
| Connectivity | 2.4GHz Wi-Fi, Blueair app |
| Material | Polypropylene body with a washable textile pre-filter sleeve (colour is the pre-filter) |
| Warranty | 12 months |
Compare Blueair Blue Pure 211i Max (3613111100) With
Cheaper Alternative
Winix 5510 (successor to the 5500-2) — $259.99
Premium Alternative
Shark NeverChange Air Purifier MAX (HP302) — $399.99