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HEPA Air Purifier Guide
Wednesday, 30 November 2011 10:09:40 Asia/Singapore
What is HEPA?
HEPA stands for “High Efficiency Particulate Air.” A HEPA filter are composed of a mat of randomly arranged fibres and is a type of air filter that satisfies certain standards of efficiency such as those set by the United States Department of Energy (DOE). By government standards, a HEPA air filter must remove 99.97% of all particles greater than 0.3 microns from the air that passes through. HEPA filters are a common tool used in many mechanical air cleaners to filter small, unwanted, and unhealthy particles out of the air.
How are HEPA Air Purifiers Work?
An air purifier is a device which removes contaminants from the air. Portable Air Purifiers are available as small tabletop units and larger console units. They are used to clean the air in a single room, but not in an entire house. Portable Air Purifiers generally have a fan to circulate the air and a cleaning device such as a mechanical air filter, electrostatic precipitator, ion generator, or UV lamp. Some units marketed as having the quietest operation may have no fan; however, units that do not have a fan typically are much less effective than units that have one.
HEPA Air Purifiers commonly marketed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating unpleasant odor. The fan in the Air Purifier forces airflow through HEPA filter, all the particles will be removing by the filter and cleaned air blow out from the unit. Air Cleaners may also have a panel filter with bonded fine particles of activated carbon, or an activated carbon filter encased in a frame, to remove gases and odors. Some portable air cleaners referred to as hybrid air cleaners use a combination of two or more of the devices discussed above.
According to the United States Environmental Protection Agency (EPA), indoor air pollution is among the top five environmental health risks, 2-5 times more polluted that outside air. HEPA Air Purifiers are the most effective Air Purifying technique commonly found to be used at homes. Anyone who does much comparison between different air purifiers will soon come across HEPA filters. They are the most effective type of filter available for removing solid particles from the air. On the other hand, they are more expensive, and are not effective at removing gasses. It would be a good idea to consider a purifier with a HEPA filter, especially over an ill-defined “HEPA-type” alternative, but be aware that there are limitations, and the presence of a HEPA filter does not by itself indicate that the purifier is a good one.
Filters always need to be regularly replaced at least once or twice a year, as well, meaning that there is an extra recurring cost in addition to the initial price of the purifier. This typically isn’t large, but over time it does add up. Of course, some customers may decide that this an acceptable price to pay for the HEPA filter’s power and reliability. Change your filters to maintain the Best Indoor Air Quality for your room.
The best way to address residential indoor air pollution usually is to control or eliminate the source of the pollutants and to ventilate the home with clean outdoor air. But ventilation may be limited by weather conditions or the levels of contaminants in the outdoor air. If the usual methods of dealing with indoor air pollutants are insufficient, HEPA Air Purifiers will be useful and effective in single rooms. HEPA Air Purifiers and other air-cleaning devices are designed to remove pollutants from indoor air. Most air-cleaning devices are designed to remove particles or gases, but some destroy contaminants that pass through them.
Air Purifiers are now commonly use in every homes as the indoor air quality is also important especially people that living and searching for higher quality life.
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