Air Filtration Systems

Written by Norene Anderson
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Air filtration systems are different in design and are different in purpose. Mechanical filters force the air through a mesh media that traps pet dander, pollen, dust mites, and other particles. Tobacco smoke also falls victim to the mechanical filtering system. The electronic filters use an electrical charge to draw in the allergens. These may be captured by collecting plates.

The air filtration systems also offer the choice of hybrid filters. The hybrid filters are a combination of the electrostatic and the mechanical filters. Gas phase filters remove gases such as paint fumes, perfumes, cooking gas, and other non-particulate pollution. This type of filtration does not remove allergens.

More about Air Filtration Systems

Air filtration systems can change the air in the room, as much as 10 room volumes every hour. You should consider only systems that remove at least 90 percent of the particles with a diameter greater than 0.3 microns. This will usually cover every allergen. A HEPA (high-efficiency particulate air) filter was developed during WWII for the purpose of keeping the radioactive particles from escaping the laboratories. It is now used effectively to purify the air in homes across America and around the world.

Before purchasing any type of air filter, determine the type of substances that need to be removed. Check out the efficiency rating. If you are buying a room-size unit, evaluate the noise level. Look for ease in changing the filter. Consider the cost of the different filter types. The clean air delivery rate should be sufficient to match the room size.

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