To effectively remove enough allergens and irritants from the processed air, indoor air purifiers must have filters that remove the full range of particles encountered. They also must not let air bypass the filter but demonstrate a total system efficiency close to the full efficiency of the filter.
Typical allergen particle sizes range from 2.5 micron for some pollens down to 0.1 micron for cat dander, dust mite feces and body parts.
What kind of indoor eliminate particles like this? Only one. hepa filter air purifier alone can remove particles this size at the efficiency levels needed to give allergy relief. But not all HEPA air cleaners are created equal.
Remember what I said about total system efficiency and air bypassing the filter? Cheap air cleaners that may include a HEPA filter as a selling point may not deliver the claimed level of efficiency.
Last Edited by cramerjohn004 on Jan 19, 2022 12:11 PM
