The Dust collector is 775 CFM -- so think a big block with a 750 Holley at WOT.... It sucks pretty good! But NOT good enough to have multiple openings going at once --- so if using multiple machines at once and not having to use the blast gates you'll need more CFM! This machine is 1.5 HP and comes 110V single phase -- we ordered the option to convert it to 220V.... as it will then draw less amperage. My trunk run and laterals are 6" ducting.
http://www.grizzly.com/products/1-1-...-Series/G0703P
I may decide to replace it with a more powerful machine.... Now that I see how great this is going to be!