|Number Of Filters||3 to 6|
HEPA filter is a High Efficiency Particulate Air filter.HEPA is an acronym that stands whether for an air purifier or other implementation,many benefits and claims.
The Institute of Environmental Sciences and Technology dictates that a HEPA filter must trap 99.97% of particulates 0.3 microns or larger. This does not mean that the filter cannot trap particles smaller than 0.3 microns, because many HEPA filters can; it is simply the threshold that must be reached in order to carry the HEPA name.
What is a micron?Particles range from ultra-microscopic to entirely detectable to the human eye. Microns, which are one-millionth of a meter, are how particles are measured. To give you a better idea of the size of a micron, or less than a micron, consider that we cannot visually see anything less than 10 microns. Bacteria can be anywhere from 0.3 to 60 microns, and 1 inch equals 25,400 microns.
Micron Comparison Chart:Spores: 3 40 micronsMold: 3 12 micronsBacteria: 0.3 60 micronsCar emissions: 1 150 micronsPure oxygen: 0.0005 micronsHow do HEPA filters work?How HEPA Filters WorkTo put it simply, HEPA filters trap air contaminants in a complex web of fibers. Depending on the size of the particle, this can happen in four different ways: Inertial Impaction, Diffusion, Interception, or Sieving.