HEPA Filter H14/H13

The filtration system is the heart of a cleanroom. The filters are designed to filter the particulates in the airdown to sub-micron sizes. The “standard high efficiency particulate air” (HEPA) filter will filter the air down to 0.3 microns (0.00001 inch; 1 micrometer = 10−6 metre) at an efficiency or 99.975%. The “ultra low particulate air (ULPA) filter” will filter the air down to 0.12 microns at an efficiency of 99.999%