I have a commercial range - 185k BTU. I'm having a hard time finding a
hood vent that handles 1600 CFM. I found a 1600 attic fan at home
depot that costs $79. I was thinking of buying a nice stainless steel
hood and running 6" or 8" ducting from the hood, through the attic and
through the roof. Can I use the attic fan as an inline fan for the
hood vent, or is there some kind of special grease management used in
the vents you buy with hood vents?

Thanks.