Posting this here because I personally only monitor this forum vs the workshops forum.
I have been monitoring air quality in the shop over winter (because the shop doors are closed) and think that I should be able to improve on the Beane filter tubes that I have now. I have not been able to find and efficiency charts for the various weights of shaker felts. I'm waiting for American Fabric Filter to get back to me, but thought I would see if anyone here might know of a resource to help make an informed decision.
I know that there are other considerations besides filter material, but i have calculated the air flow across the filters to be very low compared to typical, because I originally bought an oversized baghouse as a cyclone afterfilter. CFM / SQFT is less than 10 at the absolute max that the blower could theoretically pull through the cyclone.
Not interested in cartridge filters right now. I've had too many overflows in the past and have had them blow up due to loading.