I like the industrial but clean look of this fan. It’s 4000 CFM and 60–70db depending on speed setting. Not quiet but maybe doable for me.
I wonder if I’m better off getting a second fan, if the second fan should be in front or behind, or if something like this 14in turbo jet could be a one and done.
Not cheap but it’s a sealed motor and built for commercial purposes. Wood shops like them for DIY filter boxes.
(Edit: Added reference photo)