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HEPA stand for High-Efficiency Particulate Air, is an efficiency standard of air filter. Filters meeting the HEPA standard must satisfy certain levels of efficiency. Common standards require that a HEPA air filter must remove from the air that passes through—at least 99.95% of particles whose diameter is equal to 0.3 μm.

Why do you need it?

HEPA filters help add an extra layer of protection for you and your family, helping to filter out more of the pollutants in your indoor air. The question is, do you really need a HEPA air filter in your car or is a standard air filter enough to keep your family breathing easy year-round?

HEPA filters can provide many benefits to your family. These filters are specially designed to trap more of the harmful pollutants that enter your carbine, keeping more contaminants from entering the air and impacting carbine air quality. These filters are a great option for those with weakened immune systems who may feel a more significant impact from air pollution, such as small babies and elderly family members. They can also make it easier for those with respiratory conditions or issues breathe easier year-round.


Fine particles are pollutants that are 2.5 micrometers in size or smaller. You may have seen them abbreviated as particulate matter 2.5 or pm2.5. HEPA (High-Efficiency Particulate Air) filter is one of the best solutions to clean the air.

Does a HEPA filter remove fine particles? A HEPA filter is guaranteed to remove particles that are as small as 0.3 micrometers in size. Therefore, it does remove fine particles. However, there are other methods that can be used in conjunction with a HEPA filter to increase the likelihood of removing even the finer particles, such as activated carbon, UV light, and even upgrading your air filters

A HEPA filter employs several mechanisms to trap particles, and all those methods combined are guaranteed to be effective on fine particles that are 0.3 micrometers in size and larger. In case you’re curious, a HEPA filter uses 4 methods – impaction, sieving, interception, and diffusion.

Particles smaller than 0.3 micrometers may escape until they enter the filter again in the next air change cycle. But sooner or later, the HEPA filter will be able to trap them by diffusion. Meaning that in theory many of those particles will naturally get sucked in across the membrane of the HEPA filter and eventually be filtered out by sticking in the mesh with the larger particles.