What is True HEPA?
True HEPA (H13) filter
Captures 99.95% of 0.3 micron particles.
Short answer
Look for the H13 or H14 grade printed on the filter itself.
True HEPA when buying a air purifier
Captures 99.95% of 0.3 micron particles.
Why it matters: This is what removes PM2.5. 'HEPA-type' or 'HEPA-like' does not qualify.
Look for: Look for the H13 or H14 grade printed on the filter itself.
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