My garage is 25×29' with 10' ceilings, so 7250 cf. I'm hoping to be able to turn over the air every 3 minutes or so, so aiming at using 2 fans rated at a total of 2400cfm.
The fans I'd like to use are 10" and rated for 1200 cfm each. They attach to 10" ducts, which themselves are supposedly only capable of moving 325 cfm. The manufacturer has these fans being used in 10" ducts. They were made for them. My plans have been to have one 12" exhaust vent on the side of the building connected to a 5-10' section of 12" solid round pipe, which then connects to a wye that drops to 10" arms. From there, I'd have equal length 10" solid pipes connected to the inline fans, which in turn will have 24×24 registers to grab fumes, etc. from the ceiling.
Will this work ok? My guess is it may be loud and working harder than is good for it, especially at its highest speed. Any advice would be appreciated. Here's the fan for reference.