You don't if you have floor to ceiling double ended ventilation. Ie a door on one side and a door on the other....
I have my miners in my garage and this will be the first hot weekend of the summer. I'm hoping that by opening my garage door a few times a day I can recycle the air. Its north facing and thats where the cool wind comes from. If that doesnt work I have a 12000 BTC portable AC unit ready to go. Would rather not use it though.
Exactly! For the vast majority of the year I cool my miners passively, with 0W. In the summer I simply add a 60W fan to help aid the ventilation to ambient. Its 40x more efficient than using AC.
I hope noone can just blindly follow your suggestion.
There is a word called BTU. You dont just add 60w fan to cool.... you-dont-know how many kW.
Anyone looking to cool a mining room, needs to do proper calculation of the amount of air volume you need to move. With the dimension of the vent you have, you can calculate the air velocity required for that volume, then you can pick a fan.
Fan can use from 50w to 1000w.