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True HEPA Air Purifers Are Definitely Much Better Than HEPA-type Purifiers

January 15, 2010 by

You will probably see items that are labeled “True” HEPA if you shop for HEPA air purifiers. So, I’m sure you’re wondering, does that mean there’s a false one? Of course you would never find a product that boldly proclaimed to be a sub-standard HEPA air purifier, but to be called a True HEPA air purifier, there are some differences. As with any other purchase, it’s left to the consumer to figure out the differences and know if they need to look for one or the other. Let’s examine True HEPA air purifiers and why some products may not claim this.

True HEPA Air Purifiers Are Different

Even though they are HEPA air purifiers, if they do not say “True” or possible “Absolute” HEPA air purifier, they are not the same thing. When HEPA air purifiers are advertising effectiveness as stated by such government agencies as the EPA and OSHA, they are generally the true type even if not specifically stated on the packaging. Regardless of the other air purifiers on the market, institutions such as hospitals and laboratories are such sensitive areas that they only use true HEPA air purifiers.

True HEPA Air Purifiers Stop Particles Of DOOM

Of the different specifications that True HEPA air purifiers have to meet, the most important is probably the 97% of all 0.3 micron particles. This stat is incredibly important, and not as technical as it may sound. Of all the different pollutants floating around out there, it’s been found that 0.3 micron particles generally are the hardest to filter, even including those that are smaller. They also are the most likely to cause problems in the human body, and have no problem scooting right past our natural defenses. See, 0.3 micron particles are more scary than nerdy, aren’t they? If you want an idea of the size we’re talking about, compare 0.3 microns to the human hair. Human hair is generally anywhere between 70 and 100 microns thick.

Do True HEPA Air Purifiers Become Less Effective When Dirty?

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This is one of the main differences between True HEPA air purifiers and others. This is also where the terms “True” and “Absolute” become interchangeable. An absolute type filtration media is designed to be more effective when dirty than when clean. The addition of the trapped particles actually increases the filtration power of a true HEPA air purifier. The reason for this is actually quite simple. As the dirt builds up, the spaces through which the air can pass become smaller.

Is It A True HEPA Air Purifier? How To Know

The packaging will give you all the information you really need to know if it is a true HEPA air purifier. Beware of the many HEPA-type air purifiers that are on the market that are held no to actual standards of filtration. If the product does not advertise as either “true HEPA” or “absolute HEPA” then check for the efficiency ratings on the packaging. Remember, you are looking for it to filter at least 97 percent of those tiny, dangerous 0.3 microns and if it doesn’t then it is not a true HEPA air purifier.

Want more information about HEPA air purifiers? Check out HEPA Air Purifiers Info!

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