Hepa Filter Particle Size. This 0 3 µm particle approximates the most penetrating particle size mpps through the filter. However this is a proven and accepted fact in the filtration sciences.
Many media outlets have incorrectly stated that hepa. The fact that a hepa filter s removal efficiency increases as particle size decreases below 0 3 microns is counter intuitive. Hepa filters are ideal for very small particles measured in micrometers or microns and are represented by the symbol µm.
To hold the true hepa label a filter must capture at least 99 97 of all particles that measure 3 microns and larger.
If you purchase a room air purifier that has been labeled as hepa you can reasonably expect the filter to remove most particulates from your air including pollen mold spores tobacco smoke and more. Jan 29 2021 the expresswire final report will add the analysis of the impact of covid 19 on this industry the global high efficiency particulate. This type of air filter can theoretically remove at least 99 97 of dust pollen mold bacteria and any airborne particles with a size of 0 3 microns µm. To put particle size into perspective a human hair ranges in size from 17 181 microns in diameter most allergy causing pollen is 10 40 microns duct particles can be as small as 2 5 10 microns bacteria are generally in the range of 0 3 5 microns and viruses the smallest particles range in size from 0 004 0 1 microns.
