Having the same thoughts like you already my antminers overclocked run full speed fans with 38c and outside temperature is only 15-18c so maybe the aircondition will be the only solution or thinking of downgrading the frequency and add some fans.My room is in the basement of the house with nearly only 2 hours direct sun but will get hot for sure...
I will search for some kind of inverter aircondition.I have one in my office at work thinking of using one more...
hope the electricity bill will be something to be able to pay.....