HEPA filter: HEPA stands for High Efficiency Particulate Air and it is essentially the only true standard in air filtration products. Although it is by no means enough to guarantee fresh air, a HEPA filter should be an integral part of any clean air strategy in your home or office. In order to qualify as a HEPA filter, the filter must be mechanical and block 99.97% of particles over 0.3 microns. What we mean when we say mechanical is that this filter does not change any chemical compound or use any other form of power or electricity to modify pollutants. It is simply a very small physical barrier that combined with a powerful fan will rid your air of small particulates such as dust, tobacco smoke, fungi, pollen, mites, pet dander, and the vast majority of bacteria.
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