An air purifier is a device that removes contamination from the air. It cleans the indoor air and is particularly beneficial to asthmatics and the allergy victims.
Air purifiers are especially helpful in drastically reducing or completely eliminating second hand tobacco smoke too. In addition, when allergens come around in the spring, the air purifier will remove virtually all of them from the air inside your house.
Pollen grains, dust particles, pet dander and other such allergens can be rampant and they prompt a bout of allergies among sensitive people. Poor quality of air is also known to cause certain forms of cancer, respiratory diseases and other pulmonary infections. Air Purifiers are a great way to keep all of these diseases at bay.
Air filters are also capable of removing almost all viruses and bacterial airborne contaminates. Various processes may be used to remove the different kinds of contaminants in the air. The most common type of purification technique is the size-exclusion filter, but there is also activated carbon, ionizer purifier, photocatalytic oxidation, and liquid ionizer methods.
Certain filtration methods are really easy to understand, such as the size-exclusion filter. Particles that are above a certain size get caught in the filter, and are permanently removed when the user cleans it.
Using just a size-exclusion filter will suffice for many people, but those who become ill frequently may need something more powerful. Viruses and bacteria are some of the things that make people sick, but they are extremely tiny and can escape size filters. That is why other methods are needed to eliminate these contaminants.
Since most people do not need high tech air purifiers, the most used purifier on the market is the basic filter. Knowing the statistics, you should feel safe with such a purifier, as they can eliminate over 99.9% of contaminants from the air. This should definitely be good enough for the majority of those who need air purifiers.
The two types of basic filters to choose from are HEPA and MERV. HEPA is sensitive to particles as small as .01 micrometer while MERV is sensitive to larger particles. A HEPA filter is usually placed behind a conventional filter that cleans the coarser impurities. This helps the HEPA filter to remain clean and last longer. The filter based air purifier should be arranged in such a way that no air bypasses the filter. HEPA does not emit ozone or any other detrimental byproducts. Although the confining rate of MERV filters is less than HEPA filters, an air system at the center can move considerably much more air in an equal period of time.
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