Grizzly in my new wide belt sander recommends 1200cfm from the dust collection. The sander has two 4” dust collection ports on top.
Is it even remotely possible to provide 1200cfm from two 4” ports? The surface area of that is only 25.1 sq inches, which is less than a single 6” duct. Basically, two fours does not equal an 8, and I would think I would need 8” ducting to be able to deliver that air flow.
This will be through an Oneida 5HP dust Gorilla Pro, which is rated at 1625 CFM at 3”WC.
I’m basically thinking of putting in a wye connecting those two 4” ducts to a 6” supply duct, and calling it a day.