The following filters are filtered for PM 2.5 respectively 1 nanometer high efficiency filter Active carbon filter 3 hepa filter
The third HEPA filter is valid. The nanofilter, which is used for high-pressure water filtration, is extremely inefficient and largely impervious to air filtration.
The HEPA filter is used to filter fine particulate matter by 90-99.9%.
The active carbon filter, which adsorbs organic steam, temporarily adsorbs organic pollutants through the carbon bond, and basically does not apply to particulate matter
