Blueair Blue 511i Max review
A compact smart purifier with both particle and carbon filtration, making it particularly useful where pet dander and household odours need tackling together.
£79.99 direct from Amazon UK at time of writing
Our verdict
Our Best for Pets and Odours pick. Blueair publishes separate pollen, dust and smoke CADR figures, and the carbon stage means dander and smells are handled by the same compact machine.
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Who it suits
- Homes with cats or dogs
- Kitchens and living rooms where cooking odours linger
- Buyers wanting particle and carbon filtration in one small unit
- People who want night-mode operation
Room size and airflow
Blueair quotes CADR by pollutant rather than a single headline figure, which is more informative than a square-metre claim. At 296 m³/h for pollen it sits comfortably in normal-sized rooms rather than open-plan spaces.
Filtration
Particle filtration captures airborne pet dander and dust while activated carbon addresses odours. Carbon capacity depletes with use, so odour performance depends on keeping filters current.
Noise and everyday use
The stated 19–48 dB range with a Night mode makes it a practical bedroom option for pet owners.
Running and ownership costs
Smart filter-life monitoring removes the guesswork on replacement timing; filters are the main ongoing cost.
Full specifications
- Filtration
- Particle plus activated carbon
- Pollen CADR
- 296 m³/h
- Dust CADR
- 270 m³/h
- Smoke CADR
- 260 m³/h
- Sound level
- 19–48 dB
- Modes
- Auto and Night
- Air intake
- 360-degree
- Filter monitoring
- Smart filter-life tracking
Specifications as published by the manufacturer. Coverage figures use each manufacturer's own air-change assumptions and are not directly comparable between brands.
Strengths
- Separate pollen, dust and smoke CADR figures published
- Carbon stage suited to pet and cooking odours
- 19 dB minimum keeps it usable overnight
Considerations
- Compact format is not intended for large open-plan rooms
- Carbon filters need replacing to keep working on odours
- Amazon listings sometimes mix 511i and 511i Max variants
Our view
We selected the Blue 511i Max where dander and odour are the joint problem, because it tackles both without needing a second machine.
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