The HEPA filter is the core part of the biosafety cabinet, which consists of fiber mats that are randomly arranged. The HEPA filter is a dry, high efficiency air filter that is made from laminated borosilicate microfibers. The key metrics for impact are fiber density and diameter and filter thickness.
The HEPA filter may remove at least 97.00% of the airborne particles 0.3 micrometer diameter. This size particle is the most difficult to filter and is therefore considered to be the most permeable particle size.
Introduction
HEPA: High Efficiency Particulate air Filter;
HEPA: filtration efficiency of 99.97% for particles of 0.3 micron diameter;
ULPA: Ultra low air leakage;
ULPA: filtration efficiency of 99.999% for particles of 0.12 micron in diameter;