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* Has anyone ran into any issues with their dryer outlet not being surge protected? I'm currently dedicating a heavy duty surge protector to my mining rig
* Also, is it true that the PSU will run cooler--how to even tell, I don't know--on 220v vs. 110v?
...As far as 110 vs. 220, 220 allows you to pull lower amps, which in turn lowers the temp, in your power lines running TO your psu's. I've never worried too much about my psu temps, as they hardly ever get warm to the touch. This includes 2 apw3++, 2 sorcerer, and 2 whatsminer m3 psu's. Even recently on 88°f days, they're pretty cool.
The problem here is low voltage, or sporadic voltage (weak grid on the island). I run 1800W line conditioners on each of my miners that supply the miner, controller, and network switch.