Why 0.3 Micron Hepa Filter?

The definition of a HEPA filter is one that “removes 99.97% of the particles at 0.3 microns.” The reason 0.3 microns is used is that this is the most difficult size of particle to remove. It is called the Most Penetrating Particle Size (MPPS).

Why do HEPA filters have a 0.3 micron pore size?

The smaller the micron, the harder it is to filter out of the air. To put it into perspective the human eye can detect a particle that is approximately 10 microns. ... Bacteria can be as small as 0.3 microns, which is why 0.3 micron industrial HEPA filters are used in pharma companies.

Why 0.3 microns particles are always considered to be used as testing standard?

However, most Industry standards require testing at 0.3 micron because it tends to be the Most Penetrating Particle Size (MPPS). In other words, particles between 0.2 and 0.3 are the most difficult size particles to capture and particle larger and smaller in size or more effectively captured. ... 01 micron size.