How long do Adflo filters last?

3M’s own Adflo documentation does not publish a fixed number of hours or shifts for filter life — there is no verified “changes every X hours” figure in the manual or datasheet. What is documented is the filter stack itself: outer prefilter (836010) → spark arrestor (836000) → particle filter P SL (837012), with an optional gas filter (A1B1E1 837242 or A2 837542) behind that. The prefilter is the part 3M’s own spares layout treats as the most-replaced consumable in the stack.

In practice, particulate filters are changed when breathing resistance increases or the filter is visibly clogged or damaged, and gas filters are single-use once you can detect breakthrough odour — but these are general good-practice indicators, not numbers from 3M’s Adflo manual. For an exact interval for your workplace and environment, check 3M’s current Adflo user instructions and your respirator’s NIOSH/EN approval label, and never substitute non-3M filters — the label defines the approved configuration.