Hepa High Efficiency Particulate Air Filtration Filter Fans

This means airborne particles like pollen dust mold spores and pet dander.

Hepa high efficiency particulate air filtration filter fans.

This nasa study of hepa filtration is quite technical but the graph on page 7 and the preceding paragraph do a good job of explaining why hepa filters are actually most efficient almost 100 at. Common standards require that a hepa air filter must remove from the air that passes through at least 99 95 european standard or 99 97. It is an acronym for high efficiency particulate air filter as officially defined by the u s. In this article we show how a hepa filter works.

Hepa is short for high efficiency particulate air. Filtration in building heating ventilation and air conditioning hvac systems can play a role in a school s overall risk mitigation approach but is not generally regarded as a solution by itself. A hepa filter is a type of mechanical air filter. It works by forcing air through a fine mesh that traps harmful particles such as pollen pet.

Hepa stands for high efficiency particulate air. High efficiency particulate air hepa also known as high efficiency particulate absorbing and high efficiency particulate arrestance is an efficiency standard of air filter. Hepa stands for high efficiency particulate air hepa filters are physical filters designed to clear out at least 99 7 percent of particulates that are 0 3 microns or larger in size. Hepa filters capture variously sized particles within a multi layered netting usually made out of very fine fiberglass threads much thinner.

This is unlike the lower grade hepa filters h10 to h12 which traps 85 to 99 5 of contaminants of 0 3 microns of size in the air. 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. This means hepa filtration therefore uses high efficiency filters to clean the air of particulate matter. The h13 hepa filter is a medical grade air filter capable of removing a minimum of 99 95 particles at mpps 0 21 microns.

Filters meeting the hepa standard must satisfy certain levels of efficiency. Likewise portable high efficiency particulate air hepa air purifiers are only likely to be effective alongside other measures.