Woodnthings:
Thanks for posting that. Yes, I have a nice new system, but the principles are the same. I can add more HP (2hp) and a larger impeller (14.5"), but I still have to make sure there are no leaks, that airflow friction is as small a possible and that my canister filter is seasoned...
Here is a quote from a review that I will be posting soon.
"Particle Count: I have a Dylos particle counter in my shop. If I am in the shop, the Dylos is on. The Dylos measures the number of large particles (2.5 microns and larger) and small particles (0.5 to 2.5 microns) in the air. I have owned it for about three (3) years. I have noticed that the small particle count is quite a bit higher with the Grizzly G0440 than it was with the Jet DC-1100. At first, I was a little disappointed, but then I remembered that I had been using the Jet for four (4) years prior to getting the Dylos. The Jet canister had four (4) years to "season". A filter canister actually will become a better filter with age ("seasoning"), because the small fine particles will fill in the filter canister holes and keep them from being blown into the air outside the filter. I have emptied the sawdust collection container three (3) times since I have owned it. With each emptying of the container, I find that the particle count goes down.
Now, a little more information that I found out by accident the other day. I wasn't paying attention to my collection bin, while I was surface planing and I let the bin overfill. The plastic bag at the bottom of the filter was about 2/3 full, before I realized what I had done. After some "negative talk" to myself, I spent the next 30 minutes cleaning up. I had to clean the filter a couple of times and empty the bag twice. Here is the interesting part: the rest of the day, the Dylos readings were much lower than before the overflow!
So, a good way to season your filter is to let your collection bin overflow."
Eric