True HEPA Air Purifiers Stop Particles Of DOOM

One of the main things that a true HEPA air purifier must be able to do is filter at least 97% of 0.3 micron particles. This may sound like so much technical jargon, but it's actually quite important. 0.3 micron particles are the hardest size for filters to stop, including those particles that are even smaller. Not only that, but they are small enough to very easily bypass the human body's natural defenses and enter the respiratory system, causing all sorts of maladies. Suddenly 0.3 micron particles sound a little less nerdy, and a bit more deadly. If you're interested in how small 0.3 microns actually is, compare it to a human hair. A human hair can be anywhere from 70 to 100 microns in thickness.