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What does HEPA Stand for?

High-Efficiency Particulate Air. A HEPA filter is made of number of types of fibres. It is designed to capture particles with great efficiency. A HEPA filter can remove more than 99.97% of microns down to 0.03 microns. Essentially, this means that for every 10,000 particles entering the HEPA filter, an average of 3 would pass all the way through the filter.