Hello Guys,

I have a 126 GPU farm that was cooled by 5 split ac's 2 ton each  (total 10 ton capacity). I recently added 13 antminer s9i and the following is what happened

1. Without a room for the antminers the ambient temperature for the mining room became 41 degree celsius with all 5 ac's on.
2. The room that i use for mining is 8m x 5m x 3.8m (LxWxH)
3. outside temperature reach to 47 degrees in UAE
4. Fresh air intake without cooling wont work.
5. my dream is to turn off all ac's

My attempt to resolve the problem is as follows

-I built a room (Hot isle) for the antminers that included a window (I just put partition from gipson board on the back of the rack and the back wall is a window. I also put a gibson board on the back of the rack with holes for the 120cm exhaust fans and sealed it. However the exhaust air is removed from the window using a 2600cfm HD exhaust fan -(200cfm per miner x 13)
-I built a hot isle for the GPU rigs and i figured i need 250cfm per 13 gpu rig with total capacity of 2200cfm. Put 2 inline fans in series with 12" ducting for total capacity  of 2200cfm


Problem:

-the antminers and the exhaust fans now take all the air from the room and is alot of air is coming from the door edges and alot of air noises in my house etc.
-I have a total of 4800 cfm of air being exhausted

My questions
-Will an evaporative AC with high cfm be a good option since our humidity level is at 30-40% in Abu Dhabi (build a room inside mining room with an evaporative ac inside with the window open and a dehumidifier - the outlet for air from the evaporative ac will be the only thing exposed from the room pointing towards the rigs and antminers) or Duct option
-what other options i have to bring in cool 4800 cfm of fresh air


thanks for the help,. I will post pictures soon