Knowledge
What's drawback of HEPA air purifier?
Like any air cleaner technology, HEPA air purifiers do have their drawbacks, although they are minor. First, HEPA filters cannot capture pollutants that are smaller than 0.3 microns. Things like viruses, odors, and gas molecules are not effectively treated. Also, because air must pass through the filter, it can be difficult to clean a very large room with a HEPA filter.