Air purifiers direct air into the device with the aid of a fan. In some models, the air first passes through a washable pre-filter that traps larger particles from the air. Then the air passes through a HEPA high efficiency filter or HEPA, capturing airborne particles of a size of 0.3 microns. Air purifiers offer from 99% (the HEPA) to 99.97% (HEPA authentic) filtering of particles. Then, the filtered air back into the room quietly dispersed by a powerful three-speed fan. To increase its effectiveness, some air purifiers are equipped with an optional ionizer. The configuration of the ionizer releases negatively charged ions, which bind to the positively charged particles such as dust, flakes of pets and pollen, and thus form larger particles that make the HEPA filter more easily trapped . With proper maintenance, regular use of an air purifier will help you get rid of air pollutants and result in improved air quality and a healthier environment at home, which will increase personal comfort and welfare. The particle size which traps the air purifier is measured in microns. A micron is 1/25.400 of an inch. Particles measuring 10 microns or less are not visible to the naked eye.
Size of the objects
100 microns: the diameter of human hair
25 microns: debris or other particles
10 microns: thick dust, plant spores and pollen
5-10 microns: Skin flakes, molds, pollen, dust, normal, pet flakes 1-5 micron: fine atmospheric dust, dust mite debris 0.3 to 1 micron: snuff smoke, gases, metal