Product review (4 stars): Very Stylish, BUT design not efficient for my use
It is around 900cfm. Tested at roof discharge with velocimeter borrowed from work. Why would I test? Because the design does not pull smoke from stove top very well.  **NOTE; any hood at these dimensions will probably be the same.**
The intake area only covers the back third of stove. Six inches of the front under- hood is plain metal that holds the lights. Definitely cannot pan sear a steak.  It will still smoke up the house.
On a positive note, it is much better than my old hood and looks awesome.

I'm guessing if you want a hood that is more of a smoke extractor you will need one that covers most of the top of your stove with its intake area. Unfortunately I did not know this or I would have bought the Z Line 697-30....okay I don't know if it would work better but it is 27.5 inches deep and would cover most of stove top. I am assuming that this design would make better use of the 900cfm now that I know how the air flow works with these.