I am finally putting in proper ventilation in my studio and there seems to be a debate brewing over ducting size for cfm's.
Here are some stats.
My hood will be 24" deep and 36" wide.
It will be 23" above the table top at the bottom of the hood
There will be a solid back down to the table top and side baffles all the way down as well
The fan I am looking at is 790cfm 10" vortex fan.
The ducting run will be approx 8" vertical, one 90deg and then about 12" to outside. A very short run.
Here is the million dollar question. Is the cfm rating of the fan good enough if I take the ducting down to 8" or 7"?
It will be one heck of a lot more affordable to go to bigger ducting than to go to a higher cfm fan.
The next size up in these fans is 1140 cfm's and about $100 more.
Here is a drawing of the hood itself....
Opinions, advise always accepted gratefully.