Filter class L, M and H
System classes under EN 60335-2-69 for the whole vacuum cleaner’s ability to retain hazardous particles, not the filter alone. Class H is required for carcinogens, fungal spores and asbestos.
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HEPA H13 and H14.
Filter classes under EN 1822-1 for the filter element: H13 with at least 99.95 % and H14 with at least 99.995 % efficiency at the most penetrating particle size. A HEPA filter does not by itself make a machine class H.
99.995 %efficiency, H14
In this entry
3 short parts.
Part1The classesTested at the hardest particle size.↓ Part2Where it is usedFor health-hazardous dust.↓ Part3Related entriesMore on the same topic.↓1The classes
A class for the filter element.
EN 1822-1 classifies the filter element by its efficiency at the most penetrating particle size (MPPS).
MPPS is typically 0.1–0.3 µm: the band where filters are least effective. The filter class says nothing about the rest of the machine; for that, see class L, M and H.
2Where it is used
The final stage before the air goes back.
HEPA filters are used as the final stage where returned air must be free of health-hazardous particles.
For example on industrial vacuum cleaners for carcinogenic dust and in pharma production.
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The wiki gives general explanations. Always check the marking and the manual of your machine.
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