I'm running a 650 cfm Jet. I initially put a Wynn paper canister filter on top, along with a poly bag at the bottom. The filter has 300 sq ft of area and filters to .5 microns. I got a lot better airflow and much better control over the fine dust. One problem I ran into was that the paper filter would clog with fine dust. After turning the dust collector off, I could tap the side of the filter and watch the dust rain down into the poly bag.
I added a thien separater and it really improves the separation. Now everything seems to go down into the poly bag. If I tap the side of the filter, I no longer see a rain of fine dust going into the poly bag. I haven't really seen any drop off in airflow either.
I agree with not running fixed ductwork with such a low powered dust collector. I use a flex hose and just wheel the dust collector to the machine.
I added a thien separater and it really improves the separation. Now everything seems to go down into the poly bag. If I tap the side of the filter, I no longer see a rain of fine dust going into the poly bag. I haven't really seen any drop off in airflow either.
I agree with not running fixed ductwork with such a low powered dust collector. I use a flex hose and just wheel the dust collector to the machine.