5Rank 05 of 10 · Air Purifiers
Blueair Blue Pure 511i Max
A 1.9 kg bedroom purifier that draws 17 W and still publishes about 260 m³/h for smoke. Blueair recommends it for 18 m², which is an honest figure.
7.5BPR score
- €149Price
- 153 cfm smoke (about 260 m³/h) — published by Blueair in cfm onlyParticle CADR in m³/h, as published by the manufacturer
- 5 of 10in Air Purifiers
- 7.5BPR 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.
The 511i Max is the bedroom and home-office option: 36.8 cm tall, 1.9 kg, and at 17 W the lowest published power draw in this ranking. Blueair gives CADR values of 153 cfm for smoke, 159 for dust and 174 for pollen; the smoke figure converts to about 260 m³/h, more than the Levoit Core 300S Pro at the same €149.
The room recommendation of 18 m² corresponds to about six air changes per hour, so it can be taken at face value; '88 m² in one hour' is the same number stretched to one change per hour. Noise is stated as 19–48 dB, although the same page also gives 42 dB for the high setting, so the upper figure is not fully clear.
As with the larger Blueair, the HEPASilent filter combines electrical charging with a mechanical filter for a stated 99.97 % down to 0.1 µm. There is no EN 1822 class and no ozone statement on the page we opened. The filter lasts up to a year; its price is not shown.
Owners rate it 4.6 out of 5 across 172 reviews on Blueair's store, and 90 % would recommend it. We found no independent test of this model.
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
- 153 cfm (about 260 m³/h)
- CADR dust
- 159 cfm (about 270 m³/h)
- CADR pollen
- 174 cfm (about 296 m³/h)
- Room size recommended
- 18 m²; 44 m² in 30 minutes
- Room size at 5 air changes/h (2.4 m ceiling)
- about 22 m² (our calculation)
- Filter technology
- HEPASilent: electrical charging plus mechanical filter; 99.97 % down to 0.1 µm
- EN 1822 class
- not published
- Noise
- 19–48 dB
- Power
- 17 W
- Weight
- 1.9 kg
- Dimensions
- 36.8 × 23.6 × 23.6 cm (H × W × D)
- Filter interval
- up to 1 year, usage-tracked
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 260 m³/h (153 cfm smoke) from a 1.9 kg, 17 W unit
- Honest 18 m² recommendation, about six air changes per hour
- CADR published for smoke, dust and pollen
- 19 dB at the lowest speed according to Blueair
- 4.6/5 from 172 reviews, 90 % recommend
Worth knowing
- CADR in cfm only; top-speed noise given as both 42 and 48 dB
- Electrical charging, no EN 1822 class, no ozone statement on the page
- No independent test 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 511i MaxThis product | 7.5 | 153 cfm smoke (about 260 m³/h) — published by Blueair in cfm only | €149 |
| Category average10 products analysed | 7.4 | — | — |
FAQ
Frequently asked questions
Is the 511i Max enough for a living room?
For up to about 22 m² at five air changes per hour, yes. For a larger living room the Blue Pure 311i Max delivers almost twice the clean air for €100 more.
How loud is it at full speed?
Blueair's page gives a range of 19–48 dB but also quotes 42 dB for the high setting. We could not resolve the difference and found no independent measurement.
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