You and your butt buddy must be related because a AC units help pull the moisture out of the air not add to it. Again neither have even seen it setup to determine what the outcome will be on affecting the efficiency of the miners connected to it. He sure isn't a NASA engineer because he should know that cooler electronics perform better.

If the miner speed can be increased by cooling it and the gain is more then the cost to operate the compressor which is very low cost, then profits can be increased. Simple as that. I guess it depends on how many pennies you want to get out of your miners before they are no longer profitable.