The term HEPA seems to be everywhere nowadays. There are HEPA filter air purifiers, HEPA filter vacuum cleaners, HEPA air conditioner filters, the list goes on and on. But what, exactly, is HEPA, what does it mean, and how does it work? Let's examine the mighty HEPA air purifier, as well as other applications, to get a better understanding of this often used term.
Why Is HEPA Screaming At Me?
HEPA is written in caps because it's an acronym, like DARE or MADD. The acronym stands for "high efficiency particulate absorbing". Or, alternately, it could mean "high efficiency particulate arrestance", which is basically the same thing. In everyday English, HEPA air purifiers either stop or absorb particles of matter that are way too small for the human eye to detect.
How Can A HEPA Air Purifier Help Me?
As many of these particles come from manufactured sources, our respiratory systems often take exception to their presence. We will sometimes notice these particles as allergens or odors, but not always. In all too many situations, or bodies have no way of recognizing these particles, leaving them to wreak havoc with our bodies. This is why having something either stop or absorb these tiny particles can be such a boon to our health.
What Can HEPA Air Purifiers Do That Others Cannot?
Not all air purifiers are equal. Most entities that test any type of air purification device compare the results to "HEPA standards". This is because, for nearly half a century, this type of air filtration has been the absolute king. What makes the HEPA filter air purifiers so great, though, is their ability to stop particles 0.3 micrometers in diameter. This is not a random number or designation. It has been found that, when it comes to the human body, 0.3 micron particles are not only the most dangerous, but also among the hardest to filter.
Is There Really A Difference Between HEPA-Type And HEPA Air Purifiers?
A true HEPA air purifier is held to certain standards. Chief among these standards is the ability to filter at least 99.7% of all 0.3 micron particles that pass through the machine. This is an extremely lofty standard, and you can expect to pay a premium for this ability. Generally speaking, HEPA air purifiers are not cheap. A HEPA-type air purifier, however, is a completely different animal. It's important to realize that there is absolutely no standard whatsoever that a HEPA-type air purifier must pass. A machine with this designation could be anything from a less effective, less expensive alternative to a completely useless piece of junk. Also, be wary of putting too much trust in HEPA air purifier reviews. The best HEPA air purifier will not only produce clean smelling air, but it will also remove particulates that are not detectable with human senses alone.
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Posted under Allergies
This post was written by Angela Frazie on January 30, 2010
