I'm running 6 S9s in an out building ducting each fan individually vented outside with a 6" duct. I also have a 12,000btu ac unit cooling the room. Today it's 90F outside temp. The chip chip temps are pretty consistent mid 70s on 4 of them, but 2 are showing chain6-84 chain7-82 chain8-84. I was curious what temps you all are running now that summer is approaching?
(6) S9s at 1450W is 8700 watts, or 29,685 BTU. Good thing your venting!
85F here and my units, with just outside air, are running 57C - 75C. They are very inconsistant.
Suggest running the math for 300CFM/miner * 6 miners * (outside air - indoor target temperature) and figure out if that 12,000 btu AC is going to get overwhelmed.