Hmmm how big is the room?
It is an interesting problem since the room is sealed and there is no effort to do a true cold /hot set of aisles.
How much power do the ac units pull. You have a downclock option if too hot in the peak temps.
I allow some mixing of hot and cold aisles it actually is okay to mix the aisles a bit.
In your case you want the two aisles to mix because the room is sealed.
so if you have perfectly separated hot cold aisles the hot aisle will over heat.
worst case I see is you may need 1 split near hot aisle and space the m30s to let air mix.
bigger the room the better.
Room size is 10m*6m*3m / 32ft*19ft*9.8ft.
Each 60k btu AC pulls about 6kw worth of power, basically 1/3 of the miner's power.
Maybe a few fans sucking air from hot side back to the cold? I would imagine putting an AC in the hot side is going to melt it.
can the cold air from the split be piped to the hot side.