Edition 2026
The best air purifiers
One number decides most of this: clean air delivery rate for the size of your room. Everything else is a filter subscription in disguise.
What we look at
- Clean air delivery rate published for a stated room size
- True HEPA filtration, with the grade named
- Annual filter cost published alongside the purchase price
- Noise at the speed you would actually sleep with
- No ozone-producing ioniser sold as a feature
Helps if you have it: A third-party clean air delivery rate certificate and the published annual filter cost.
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