HEPA filters are sometimes referred to as HYPER filters for their ability to eliminate such high percentages of airborne particles. These particles can be as small as 0.3 micrometers in diameter! HEPA filters get rid of, at the very least, 99.96 percent of even these smallest particles. These particles are usually the most complicated to filter, if not impossible.
The HEPA filter was originally created in the 1940’s and put to use to stop the spread of radioactive airborne particles. The HEPA filter was first made public in the 1950s and its name, HEPA, became the broad name for any similarly-designed filter. Over the past 50 years, there has been much advancement made in the filter production and design. Today, HEPA filters are commonly used in places such as hospitals and even in vacuum cleaners.