Temperature swings are the number one way to kill the miners. There is no reason why you would have to have intake temperature lower than 30 C. I’m building a 2 MW mining farm and am just using air flow and exhaust to maintain temperatures. Your best bet would be to have an intake of fresh filtered air and exhaust fans to evacuate the hot air out of the room.
I Agree here i feel ashamed of this happening to me as i have another location operating with 28 miners but of course i never did this on the other one i though that it was gonna be a good thing seem like it was the opposite