Do you have outside doors, you can replace solid doors with metal bar'd doors. The problem you have is your pumping energy into the room, you have to remove the heat. You really have to vent the exhaust heat outside somehow, sounds like your over 105 degrees in the warehouse, which means you may already be looking at damage to the equipment already.

I do believe you really have to get rid of the hot air, I have a few 100 of these running and there is really no way treat the hot air coming out of these units, you just have to duct it outside.

You have to get rid of the hot air, and bring in fresh air. S9's generate 90 cfm of air flow each, if you can capture the hot air you can channel it to an exit point. Dont try and cool the room with an air conditioner, its better to use that power for miners. Evaporative cooling works, but it raises the humidity and can cause corrosion, although s9's may only be viable for another 5 to 8 months. If you have a ceiling vent you might try arranging in a circle and vent the air up, that takes advantage of hot air displacement, I have seen a number of large setups do that.

just my $.02

Colostore currently has space available, $30 per colo @ $.11 per kwh. been in business for the last 12 years.