Letter Re: NBC Protective Masks
Jim, “Grampa R.” wrote in, asking about changing filters in a contaminated environment. I agree with you on the constant exhale method. I’ve also seen military NBC folks cover the opening after removing the filter while changing it to a new one. This seemed a little complicated to me, even with the other filter prepped for install. Also, this method would necessitate deconing your gloves or whatever you would use to cover the hole before covering the hole (or you would risk inhaling contaminant that might be on your gloves.) I like the method you described much better. It is …