Filtermist’s ‘HE’ (High Efficiency Afterfilters) have a higher efficiency rating than AFA afterfilters.
AFA afterfilters have filter media rated to F8, which removes 90-95% of particles with a diameter of 0.4 μm (micron) or less. Filtermist’s AFA afterfilters have been proven to remove more than 92% of particles with diameters of 0.4 μm (micron).
Our High Efficiency Afterfilters have filter media rated to H13, which removes 99.95% of particles with a diameter of 0.3 μm (micron).