Ozone-Generating Air Purifiers
'Ionic' or ozone air cleaners run in an occupied room.
How this score is built
- 100Start
- 72.4Chemical hazard 6 × 4.6−27.6
- 58.8Everyday exposure 4 × 3.4−13.6
- 56Persistence 1 × 2.6−2.6, then rounded to 56
- ModerateThe band56 sits in 40–59.
What each input rests on
| Input | Rating | Evidence |
|---|---|---|
| Chemical hazard | 6/10 | unsourced input |
| Everyday exposure | 4/10 |
|
| Persistence | 1/10 | unsourced input |
Ratings are editorial. A study listed here supports the rating; it did not compute it. How the index is built
What this means for you
The chemical-hazard rating is what drives the score down. Ozone is a lung irritant, and the EPA's review concluded these devices do not control indoor pollutants effectively at concentrations that stay below public-health limits. Some ionisers also make ozone as a by-product, then sell the resulting smell as 'fresh air' when it is the irritant itself.
Evidence strength: strong
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