The significance of HEPA filtration system in wide range of industrial and residential applications has greatly been recognized across the world. However, many people are still aware of what HEPA filtration system is and why it is important. This article serves as an easy to understand, brief explanation of HEPA filtration system.
The HEPA filtration system is based on HEPA filters, which use two diverse mechanisms to clean the air. First, there are the outer filters that work just like the sieves to stop the bigger particles of dust, dirt and hair. Inside these outer filters, a concertina is there that looks like folded paper developed to trap the little particles. The paper is made of a mat of finely dense glass fibers and, as opposed to the gauze, it doesn’t filter out the small dust particles as sieve does.
Rather, it uses three mechanisms to trap the dust particles once they flow through in the moving airstream. At high air speeds, certain particles are trapped and eliminated once they smash directly into the fibers, while others stick on the fibers once they try to brush by. At lower air speeds, the dust particles pass through more randomly via filter (a process called Brownian motion after its inventor, Scottish botanist Robert Brown) and might stick to its fibers as they do so. Organized, these mechanisms let HEPA filters to capture the particles that are both smaller and bigger than a specific target size.
An ideal HEPA filtration system is one that has a filter able to trap 99.97 percent of the dust particles having size 0.3 microns in diameter. There’s nothing chiefly significant about particles 0.3 microns in diameter: they are just the ones most likely to pass through the filter, and larger and smaller particles than this are captured even more effectively.