![]() ![]() High Efficiency Particulate Air filters (HEPA filters for short) are everywhere today. From vacuum cleaners to air purifiers and even airplanes and motor vehicles, they are a powerful barrier between airborne pollutants and our delicate lungs. ![]() A true HEPA filter can remove at least 99.97% of particles 0.3-micron in size from the air. Considering they have a Lifetime value of 1.0, they may be spawning constantly despite the system itself needing to be shutdown. That’s about 300 times smaller than a strand of human hair. I’m having an issue where, at random times, certain particles in my particle system are getting stuck. HEPA filters come from an interesting background. The growth of industrial manufacturing and strict air pollution laws brough HEPA filters indoors to families around the world.ĭid you know? HEPA filters were first created in the 1940s to combat airborne radioactive contaminants during wartime. Made with a combination of interweaving fibres, it acts as an intricate spider’s web that traps contaminants and pollutions through four main processes: HEPA filters are so efficient because of their design. Direct impaction: Large contaminants like dust and pollen are caught here.Sieving: Finer particles are sieved through two fibres and trapped.Interception: Even smaller particles that move with the airflow are pushed through the fibre webbing and stuck to the sides of these fibres.Diffusion: Ultrafine particles that manage to escape the first three processes are passed through a tightly woven filter that keeps them from passing through the air.įact or fake - are all HEPA filters the same?.HEPA filters come in all shapes and sizes, but not all filters are the same.
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