Posted by fishbowl I'm about to pull the trigger on a 3M brand 6000 series half mask respirator. The included filters are a pair of 2091s. I have read that these do filter out asbestos, but do not have the nuisance filter like the 2097s do. My question is how long do these types of filters tend to last? Will I need to think about replacing them anytime soon? Does their duration of effectiveness depend on just time, or amount of use?
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In general: It depends on how much you use them and how you store them when not in use. If you have them out every weekend or more and dont store them in a closed plastic bag, they could be useless in less than a month. If you place them in a bag and only use them once a month they could go for a little while longer. Just be aware that as soon as you open the filter up from its packaging it starts absorbing, so it is only a matter of time.
2091 Filter: The 2091s arent the best filter for lifespan. They are considered a disposable filter (usually packaged in 50 or more). These guys are thin and meant to be thrown away each time or nearly each time after use.