Update.  Finally the Hammer A3 31 arrived.  I set up everything and tested the machine with the Dust Right 1250cfm wall mounted dust collector with the Oneida 4" dust deputy, and a 2-14 feet expandable 4" hose through a 4"PVC coupling adaptor to the machine.  Overall I am very satisfied with the dust collection results.  That are a little bit larger chips but overall the working area is very clean without any noticeable fine dust observed. 

At first, I was regret that I bought the Oneida 4" dust deputy and thought I should buy the 5' one with 5" hose.  After I tested the machine, I don't regret anymore, 4" hose works just fine for me and it's enough for what I need.

Quote from: lshj on January 30, 2022, 08:31 PM

Overall I am very satisfied with the dust collection results.  That are a little bit larger chips but overall the working area is very clean without any noticeable fine dust observed. 

It is a bit hard to observe something that can't be seen.

At some point you just have to say "I wish you the best" and move on.  I think you have done your best, but there is only so much you can do.

I gave up trying to convince my friends there is a difference between chips that fall on the floor and harmful dust they can't see.  Even when I bring my Dylos DC1700 to their shop and let them see the numbers skyrocket, they are not convinced.

I tested two pieces of wood and didn't realize how much chips that were generated until I opened the dust deputy.  Almost all the wood chips have been collected by the dust collector.  I would say that this dust collector is >99.9% effective to collect all these wood chips.

I am fully aware of the unobservable fine dust.  The 1250 CPM dust collector is good enough  for the hammer A3 31 jointer. The major problem is not lacking of the suction power.  It's the canister filter which is only rated at 1 micron and not meet other peoples requirement for the 0.3 micron filter.  I don't know if I could buy an 0.3 micron filter that fit the Dust Right 1250 dust collector?

I am not a professional wood worker that breath in the filtered air in the workshop everyday. I am just a wood working hobbyist doing some weekend woodworking project, probably use this machine no more than once a week.  I read some articles saying that for nonprofessional woodworking hobbyist, there is no observed health risk.  I think my dust collection set up is not inferior to an average woodworking hobbyist.  In addition, I live in Los Angeles which has dirty air, smaller than 1 micron fine dust is everywhere in the air of Los Angeles.  To solve this fine dust problem, I think what I need is not the dust collector, but an air purification system with 0.3 micron or even better filter, not only for the garage workshop, but for the entire house.

I also have a JET AFS-1000B air filtration system that I bought many years ago hanging on the ceiling of the garage. I bought it because of very  good review but I have not used it  very often.  Then I realized  that the JET  filter is only 5 micron, even worse than my dust collector filter. It seems there is no point to use this JET air filtration system.  The dust collection of this hammer A3-31 is so good that I barely see any chips left out after planing.  In contrast, the festool track saw with dust extractor has horrible dust collection and small dust is everywhere after each use.  I think it's probably more difficult to collect the dust from a saw. I moved my table saw to my backyard shed and moved the saw to outside deck whenever I want to use it.  I refused to use the table saw inside because I couldn't get satisfactory dust collection for a table saw.