It could be set to run full hash while you are away from the house quite easily and 10% or less capacity while at home. Bitmain is already considering low power options for home miners!
Because an underclock S19 would still do 2300W which would release more heat than an S9 mining at full power, thus the fans are needed.
It's one thing to disperse 600W in a cold environment a different thing for 2000W.
And if you plan to strip it down to reduce consumption, why even do it, you're just throwing away money at a really expensive heater unlike what OP is doing.


There is:
https://bitcointalk.org/index.php?topic=5428227.msg61466927#msg61466927