You HAVE to add more air to the intake side, if you can't do that on the walls, simply use the roof, if you can't, then you have to reduce the number of miners, there is really no workaround to by-pass physics.
I thought about that too. That's why on my second farm I increased my intake air of the room. But I'm confused. The only thing about the computation that I'm not sure of, is the antminer s9 fan intake CFM. I based my calculations that an S9 14th/14.5th can intake 200CFM per unit ( I read that somewhere in the forum few months ago) but I think fans at 100% full speed draw a lot more than 200CFM.
Cuz in the second farm my intake air is around 12,000 CFM, and let's say 45pcs S9 intake at 200CFM each that's 45x200= 9000CFM there should be 3000CFM which won't be replaced in a minute (based on the equation).
If you have any idea about how much air does an S9 Fan at 100% full speed suck kindly guide me.