Allergen Reducer Filters
According to the United States Environmental Protection Agency, there are several different types of air cleaners for home use. Air cleaners remove unwanted pollutants from indoor air. The most common designs are freestanding models and air cleaners installed into the framework of the house.
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Air Filter
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Mechanical air filters are similar to coffee filters. Air filters remove particles from the air using either a mechanical or electronic method. Mechanical air filters capture particles on a filter material, this is the most common form of air cleaner. High-efficiency particle air (HEPA) filters fall in this group. Electronic air filters work by ionizing the particles so they either stick to collector plates or quickly fall to the ground.
Gas-Phase Air Filter
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Gas-phase air filters use materials such as charcoal to absorb gaseous pollutants. These filters tend to be specific for one or a small number of pollutants, which may be a drawback. Gas-phase air filters are not expected to completely clean the air in a home.
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UVGI
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Ultraviolet radiation can destroy microorganisms with sufficient exposure. Ultraviolet germicidal irradiation (UVGI) uses ultraviolet radiation to break down microorganisms. This method is generally used to break down any bacteria, mold, viruses or allergens that may be on the surfaces of ductwork. This method is used along in conjunction with others and is not suitable for use as a sole air cleaner.
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References
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