I currently have a 2 HP DC, a CX400 from Busy Bee with canister filter. Same machine as the Grizzly G0548ZP. I have a short 6" ducted run (12') which reduces to 4" at my machines, except for the planer which reduces to 5". It all goes through a Super Dust Deputy before the DC.
Machines are
Table Saw, 8" Jointer and 20" planer with spiral cutterheads, bandsaw, 6 X 89" edge sander, miter saw, full size spindle sander.
Am contemplating moving to the 3 HP variant, CX402 (Grizzly G0562ZP)
My issue is that both units have the same size impeller (12 3/4"). I also read a post on the Canadian Woodworking site which seemed to tell me that I would not really see any improvement following this course of action. I have cut and pasted the relevant section below.
"The impellers are exactly the same diameter with same number of curved vanes. The 3HP unit is cast, the 2HP fabricated.
They drew exactly the same amount of water on test. About 5" on my rig or a total SP of 10".
Why then does one have a 3HP motor and the other a 2HP? I have suspected for some time that these units had the same blowers, but because the larger one has two filters instead of one, there is way more surface area and 1/2 as much back pressure, therefore more airflow. More flow requires more HP. Could explain why the impeller is cast as the additional flow puts more stress on the vanes.
Therefore I can expect minimal performance improvement with my current setup."
Looking for input about the position stated above.