I know this is an older topic but I was looking for a GOOD respirator for the same reasons even before starting to grow a beard. IF you have since found a good respirator for use with a beard Id REALLY like to hear about it. Tired of picking my nose for an hour after work and worried about the health issues. I dont know if this notifies you of replys but maybe you could message me as well... I am REALLY interested in this topic!!