exhaust looks good, I would put up a barrier wall on the back of the s9's. don't seal it off but block the air so it can get sucked out by the exhaust fans. I would add cool air inlet fans on the opposite wall to allow more fresh air in. 4 s9's per 30 amp breaker with 220v, highly recommend a nice industrial power strip like a 30 amp knurr server strip. any more questions feel free to ask
Thanks for the reply doctorace! These are the PDUs I got:
https://www.tripplite.com/4.8-5.8kw-single-phase-basic-pdu-200-240v-outlets-16-c13-4-c19-l6-30p-15ft-cord-1u-rack-mount~PDU1230/The top left corner of the image is the corner of my garage. Ideally Id like the inlet on the oposite wall as the exhaust, creating a hot/cold aisle, but thats the interior of my garage. I at one point had the inlet on the bottom left side wall, but unfortunately the power meter is on the other side of the wall.
Good idea about the air barrier, Ill definitely look into that as well. I guess I may just point the inlet fan to the right (towards the door) and blow it towards that side of the room to help.