Quote Originally Posted by David Kumm View Post
It would be interesting to see their impeller design and numbers up to 12" sp. Dave

Here is the info for Belfab's dust collectors. The standard and hummer (1750 rpm) are on the same chart. You'll have to scroll down a bit to see.

https://www.pyradia.com/wp-content/u...IES-NBM-OP.pdf

I don't see that I have any data on the Nederman nor any on their website.

Greg