Why filtration grade matters for asthma
For asthmatics, a sealed H13 True HEPA filter is non-negotiable — it captures 99.97% of particles down to 0.3 microns.
What to avoid
- Ionisers and ozone generators.
- Washable "HEPA-type" filters that leak.
Best air purifiers for asthma (2026)
For asthma the filter grade matters more than price — sealed H13 HEPA, no ozone.
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