What we have found in the small dense under ventilated room is there are knees or cliffs of rocket 🚀 to the move temps.
Ie 95f outside temp all good inside the room hotspot 99f
but 99f outside temp runaway thermals room hotspot 117f
or 150kwatts 90f outside temp 94f in room
but add 6kwatts to 156kwatts and same room will shoot to 117f
you are going to find out your pivot points by under clocking say 2000 watts a unit.
good.
Exactly what I expect/worry about, the relationship between room temp and hardware consumption isn't going to be linear, this is also true for air cooling, i.e I know when I underclock M30s from 3400 down to 3200, they get a huge drop in temps, going from 3200 to 3000 is good but not as effective, so without air flow, this should be even more noticeable, hot spots will be there, a single miner going online/offline could have a large impact on the whole room, this will require a lot of trial and error until we understand "the place's behavior under different conditions" just like how you understand yours now.
get a temp app for the phone set it to warn you then under clock ⏰.
Ya I have got one, I get instant notifications for temps and humidity levels that I set, it's very helpful when you are not watching the farm, I think it's a must in every mining farm.