Jabby brought up EMF in an earlier thread so I thought I would perform some tests. Now these are very non-scientific backyard DIY observations, and no claims are made by me one way or another as to the safety of this equipment. I am just passing on what I saw using a cheap EMF meter. So if you get cancer or grow a 3rd arm IT'S NOT MY FAULT!
The meter I used is here
http://amzn.to/2Grg8ovAlright, so I started roughly 20' away from my 3 miners (2 S9s and 1 S7 all running new Bitmain APW3++). Zero readings on my meter.
10' No reading on the meter
1' from an S9 Jan batch 13.5 TH/s
6.5" From an S9 Jan batch 13.5 TH/s
Right up on the miner
After that I tested some household items.
Regular fan ~12"
Regular fan ~5"
Right up on the fan motor
Breaker panel
Breaker
Brother printer!
Pioneer Stereo Reciver
TV
Microwave running
So I feel that yeah, if you blanket yourself in Antminers it's bad
But more than a foot or so and you do not have to worry. As an anecdote the meter started flashing harmful when I was outside my garage near a power line...