I was running 7 C1s in South Florida, had an A/C running but in a large room so didn't do much. The room was definitely getting up to almost 30C in the room with all miners running overclocked.

Miner temperature was over 40C... close to 47C sometimes and were all running great!

I had two of them in a room with no A/C, stock clock.. they were running around 42C and also running stable.

I purchased 7 C1s from Bitmain with Syscooling kit in tow.. out of all 7 kits the only problem was two fans were broken on the thin plastic connectors between the fan itself and the fan frame. Everything has been running for 5 weeks without issue, all works perfect, pumps, fans, etc...

I simply went to Amazon and purchased two replacement fans and continued mining. Easy replacement and not expensive at all.

I am impressed at this point with Syscooling. It is quite nice to have such quiet miners.. thanks to Bitmain/Syscooling.