HEPA VS. ULPA IN A CLEANROOM

1. This large circle represents the cross section of a human hair, with an average visible diameter of 75μm.

 

2. This smaller circle, still visible to the human eye, represents a 50μm diameter particle.

 

3. This represents a 0.3μm diameter particle. HEPA filters remove over 99.97%

 

4. This represents a 0.12μm diameter particle. ULPA filters remove over 99.999%.

 

How Small is a Micron

 

*All micron/micrometer/micrometre/μm are approximate and are for size comparison only.

 

 

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