Well, I have a couple of them that I don't use any more. I switched to a 'mandibular advancement device' which is the mouth guard thing, and I like it a lot better. The CPAP machines would have sufficient air flow to keep a positive pressure face mask set up going. My guess is that the filter on the CPAP would not be up to standards for dust control. I would expect that you would have to fabricate a filter of some sort, maybe even stacking a couple of the ones for the PP dust masks together. This could vary a lot depending on the amount of pressure your machine is set up for. I think it would be a pain to fabricate a mask for your face that would work any where near what the ones that are designed for it do. I did consider that, and the problem is the neoprene fitting that goes around your beard and chin.... I do have one friend that got a mask set up that they use in operating rooms, which is kind of a total head and shoulder covering, and it seems to work well. Not sure what else is out there that could be used. I doubt that there would be any necessity of sterilizing the hose if you are using it in the wood shop, unless you are trying to moisturize the air as it comes through, which shouldn't be necessary since the PP dust masks flow over and around your face and you don't inhale it directly.
robo hippy