• 1 Post
  • 1.37K Comments
Joined 1 year ago
cake
Cake day: July 1st, 2023

help-circle







  • I addressed that.

    As background, as a firefighter I had to twice annually test the seal of my mask, and stay clean shaven.

    They had a device that sensed the air moving through the mask, and a candle would be lit right near you.

    A few times in my career a mask I felt was a great fit, that fully sealed, marginally failed the test, and I would be issued a new one.

    Such a process (or anything similar to it) is not what you want for something as important as this. ANY leaking ambient air is a problem.