The letters in the word HEPA stand for High Efficiency Particulate Air/Arrestor
. The HEPA air filter was developed during World War II. It was designed to remove and capture radioactive particles from the air which could turn out to be a health hazard to researchers. For a filter to be called a true HEPA it must retain and filter all particles from the air that are as small as 0.3 microns in size, at an efficiency of 99.97%.
A HEPA air purifier works by drawing impure air through an inlet grill with the help of a fan. The air then passes through a filter that traps allergens such as pollen, animal dander, mold spores, and dust. Sometimes HEPA filters also have a carbon filter included for odor control. Large filters are always better as they obstruct more particles, leaving fewer clogs.
HEPA filters are made of thin paper for maximum effectiveness. You might have noticed that only some air purifier companies protect the HEPA filter well. This is because, though it is the last layer of the purifying system, it is the most important part.
Air purifiers from Oxynet Solutions use 100% secure technology and are true HEPA. These machines purify the impure air through several highly effective filtering stages. Click here for more information.