Jeeze whereabouts are you that 45C is normal?
We get hot and humid summers in southern Ontario and as long as their was managed airflow there was no need for AC. But agree that introducing some cold air will maintain the health of the miners long term. Easy to calculate your overhead and stay profitable.
very close to the sahara desert "no joke" , if power is dirt cheap AC is the way to go i the summer, if not the you will need to move a ton of air around the miners when it get's really hot. it's just a matter of everyone own abilities.
cheers