3 ms·
The purifiers I use have the activated charcoal before the HEPA. Probably doesn't matter that much though I sometimes findd a small amount of dust leakage from
by dwd 8y ago
The purifiers I use have the activated charcoal before the HEPA. Probably doesn't matter that much though I sometimes findd a small amount of dust leakage from the pre-filter screen on the carbon filter which would just clog the HEPA.
- bradlys 8y agoMany don't have a prefilter and use the charcoal as the prefilter, essentially. I end up vacuuming mine or shaking it out (outside) every couple months to get rid of the build up.