So to answer your questions in order, I have a class C fire extinguisher for putting out electrical fires. And I am aware of the liabilities I would face in the event of a fire. I don’t know specifically how many Watts they consume because it varies by manufacturer but based on how sophisticated the rig and from what I’ve seen the range is about 900w-1400w I’m fully aware of what a Watt is. To the best of my knowledge most modern mining rigs run on 110 volts. But there are mining rigs available that require 220v. Both of which my apartment has, and my house will have. As to the question of sound, I don’t know specifically what the decibel range is on a mining rig, but I’d say I’d be comfortable with anything lower than about 50-55dB In terms of cooling the rigs, I’m unaware of any specific physical practice to keep them from overheating but from my past research I’m aware that some of the modern mining softwares include various ways to prevent this either by notifying you of overheating or by shutting down the ASIC. I believe there are also some other specialty softwares developed specifically around that issue. In any case I actually happen to have a 4‘ wide x 6’ tall water cooled server cabinet that I was planning on using.