When I bought my speedglas I was trying to check the FPP rating on the filters but I seem to remember I had trouble finding the rating...may be different these days?
I always use mine with the carbon filter...but it does reduce the run time I think.
all i know is the adflo he filter is p100. 99.97% filtration of particuls .3 micron and larger. i dont know about gas or vapors. maybe thats why theres other types of filters that can be fitted to the adflo ?