3Rank 03 of 10 · Air Purifiers
Blueair Blue Pure 311i Max (3350i)
Three separate CADR values, a sensible 36 m² room recommendation and the best owner ratings among the larger machines. The filter relies partly on electrical charging, and we found no independent test of this exact model.
7.7BPR score
- €249Price
- 283 cfm smoke (about 481 m³/h) — published by Blueair in cfm onlyParticle CADR in m³/h, as published by the manufacturer
- 3 of 10in Air Purifiers
- 7.7BPR score 0–10
Review
What this product is
Written after the analysis, from the same sources the score is built on: the manufacturer's documentation, available studies and verified owner feedback.
Blueair's mid-size model suits living rooms of 30 to 40 m². It is one of only two brands here that publish CADR separately for smoke, dust and pollen: 283, 314 and 365 cfm. Converted, the smoke figure is about 481 m³/h, the second-highest in this ranking, for €249. The page gives no value in m³/h, which is odd for a European store.
The room recommendation is unusually straight. Blueair says 36 m², which corresponds to about 5.6 air changes per hour, and only then adds '86 m² in 30 minutes'. Noise is stated as 23–50 dB, power as 32 W, weight as 3.5 kg.
The filter uses what Blueair calls HEPASilent: particles are electrically charged and then caught by a mechanical filter, for a stated 99.97 % down to 0.1 µm. That is not a classified EN 1822 filter, and the page we opened carries no ozone statement. The filter lasts up to a year, tracked by usage; a filter price is not shown.
Owner feedback is strong: 4.7 out of 5 from 218 reviews on Blueair's store, with 94 % recommending it. The evidence gap is independent testing: HouseFresh has measured other Blue Pure models, but we found no test of this version.
Technical data
Specification
Figures from the manufacturer's documentation, verified against available outside sources. Values we could not confirm are marked as declared.
- CADR smoke
- 283 cfm (about 481 m³/h)
- CADR dust
- 314 cfm (about 533 m³/h)
- CADR pollen
- 365 cfm (about 620 m³/h)
- Room size recommended
- 36 m²; 86 m² in 30 minutes
- Room size at 5 air changes/h (2.4 m ceiling)
- about 40 m² (our calculation)
- Filter technology
- HEPASilent: electrical charging plus mechanical filter; 99.97 % down to 0.1 µm
- EN 1822 class
- not published
- Noise
- 23–50 dB
- Power
- 32 W
- Weight
- 3.5 kg
- Dimensions
- 484 × 318 × 318 mm (H × W × D)
- Filter interval
- up to 1 year, usage-tracked (RealTrack)
Component scores
Where the score
comes from.
Four components, equal weight, each on a 0–10 scale and each resting on a named source. The overall score is their mean — the full procedure is in the methodology.
What we liked
- About 481 m³/h (283 cfm smoke) for €249: roughly €0.52 per m³/h
- CADR published separately for smoke, dust and pollen
- Realistic 36 m² recommendation, about 5.6 air changes per hour
- 32 W maximum and only 3.5 kg
- 4.7/5 from 218 reviews on blueair.co, 94 % recommend
Worth knowing
- CADR given only in cfm on the European page
- No EN 1822 class; relies on electrical charging plus mechanical filter
- No ozone statement on the page we opened
- No independent test of this model found; filter price not shown
Comparison
How it compares
within the category
All values come from the same analysis and are comparable only within the category Air Purifiers.
| Product | Score | Particle CADR in m³/h, as published by the manufacturer | Price |
|---|---|---|---|
| Air 4000Top score | 8.4 | 300 m³/h — published by Bosch; not independently certified on the product page | €198 |
| Blue Pure 311i Max (3350i)This product | 7.7 | 283 cfm smoke (about 481 m³/h) — published by Blueair in cfm only | €249 |
| Category average10 products analysed | 7.4 | — | — |
FAQ
Frequently asked questions
How do I convert Blueair's cfm figures?
Multiply by 1.699. 283 cfm for smoke is about 481 m³/h, 314 cfm for dust about 533 m³/h and 365 cfm for pollen about 620 m³/h. Use the smoke value for comparisons; it covers the smallest particles.
Does HEPASilent produce ozone?
The product page we opened describes electrical charging of particles but makes no ozone statement. We could not verify an ozone measurement for this model, so ask the seller for the test report if this is important to you.
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