Agreed, manual specs don't make sense.? ??
I don't know know anything wide belts specifically, but 25HP is a lot of material removal power, and crude extrapolation from saws suggests to me that 4500 fpm and 1200 cfm is nowhere near enough to pull 25HP worth of dust.? ?
I would note that the spec of 2700 cfm @4500 fpm is very close to two 7" ducts could handle.? Is there any chance there's two ports?
As one random point of comparison, I glanced at specs for a 25HP grizzly WB and it has six 4" ports, which is close to area of two 7" ducts.
Presumably Kundig can help clarify.?