Do N95 Face Masks Expire?
Researchers at University of NC
and EPA
tested brand new and 10-year-old expired 3M N95 face masks.
The oldest masks had expired 11 years before the study.
And if the expiration lifespan is 5 years, that means the oldest masks were 16 years old.
1/
Researchers at University of NC
and EPA
tested brand new and 10-year-old expired 3M N95 face masks.
The oldest masks had expired 11 years before the study.
And if the expiration lifespan is 5 years, that means the oldest masks were 16 years old.
1/
https://twitter.com/SmartAirFilters/status/1817542302480449856
Importantly, the researchers tested the masks on real people’s faces, rather than manikins. These fit tests are important because they take into account the part that people most suspect would degrade–the straps and other pieces that influence fit.
2/
2/
Fit tests compare the number of particles inside the mask while a person is wearing it versus the number of particles outside the mask. In this study, the average particle size was tiny–0.05 microns.
3/
3/
10-Year-Old Expired N95 Masks as Effective as New
Surprisingly, the expired N95 masks were within one percent as effective as the brand-new masks–essentially indistinguishable.
4/
Surprisingly, the expired N95 masks were within one percent as effective as the brand-new masks–essentially indistinguishable.
4/
Lifespan in real life is much better than you are told most of the time
Here another publication
5/smartairfilters.com/en/blog/how-lo…
Here another publication
5/smartairfilters.com/en/blog/how-lo…
Good sources ⬇️
smartairfilters.com/blog/the-dange…
smartairfilters.com/en/blog/best-p…
smartairfilters.com/en/blog/cdc-st…
smartairfilters.com/en/blog/author…
smartairfilters.com/blog/the-dange…
smartairfilters.com/en/blog/best-p…
smartairfilters.com/en/blog/cdc-st…
smartairfilters.com/en/blog/author…
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