thinking about filters

I know that fine particles-- especially the kind that are a few microns or smaller-- are quite unhealth for your lungs. I can't help but wonder about potential risks to our lungs from CPAP machines that are of course blasting lots of air into them-- along with whatever fine particles may happen to be hanging around. Has anyone come across research to look at the extent to which this is (or is not) a real concern?

This thought did make me look into what filter options appear to be available, and I know folks have discussed this one a bit:

https://www.cpap.com/productpage/In-lin ... bipap.html

It's surprisingly hard to find out specific information about these and similar products, though-- e.g., target particle size, and removal efficiency (99.9%? 99.99%? other?). And despite the claim on the website, I would have to wonder if they'd affect airflow. Anyone else gotten further on this topic, by any chance?

how hard is it to attach these to your nares, so you can breath filtered air during your awake times too. Jim