4 ms·
Some models (particularly from 3M) can be fit with output filters: https://www.3m.com/3M/en_US/p/d/v101254496/ https://www.3m.com/3M/en_US/p/d/v101254496/ I ha
by qbasic_forever 5y ago
Some models (particularly from 3M) can be fit with output filters: https://www.3m.com/3M/en_US/p/d/v101254496/ https://www.3m.com/3M/en_US/p/d/v101254496/ I have even seen explicit P100 filtering for these output filters.
Anecdotally I just ziptied a surgical mask over the exhaust on mine and it's fine.