Air purifiers remove pollutants from air which prevails in a room. There are many airborne contaminants that are present in the air such as chemicals, microorganisms and odors. Patients suffering from the diseases like allergies, asthma, Multiple Chemical Sensitivity (MCS), weakened immune system, require an air purifier.
The technology used in air purifier will remove particulates, chemicals and odor. The effectiveness and efficiency of the technologies differ from each other. The technologies used in the purifiers are here under:
Negative ions clean the particulates present in the air, like dust, dander and pollen by magnetically attracting the pollutants towards them, until these newly-formed larger particles become too heavy to remain in the air.
Heat can be used to sterilize indoor air by using a ceramic core that destroys 99.99% of all microorganisms which are burned at temperatures around 400F (250ºC). Heat is totally natural and doesn’t employ chemical or toxic products.
High Efficiency Particulate Arresting (HEPA):
HEPA filters will filter particulates of 0.03 micron size with an efficiency of 99.97%. The systems made up of HEPA contains thin maze of fibers. Electronic air purifiers, which are commercially used in hotels and restaurants, use HEPA technology.
Activated carbon is used to adsorb chemicals from the air flow of air purifiers. In this the chemicals parts get attached to the carbon by Van der Waals forces.
Ultra Violet Rays:
Ultraviolet light used in air purifier’s releases radiation in the range of 150 to 300 nanometers. With effect of this radiation, thymine molecules in DNA are unraveled. Thus any microorganism that gets exposed to these radiations dies.
Ozone molecule is the combination of three oxygen atoms; as soon as other atom gets attached to it the third oxygen atom leaves the molecule. Generally it is used to purify the odors.