The room with my miners currently has a humidity level of %12. The air is very dry, I am not sure at what point it will become a problem....or what I could do about it? I suspect a humidifier wont accomplish much as the hot air is being exhausted outside, so any humidifying I do will just be exhausted out as well I think.
The humidity is nothing more than water in the air in the form of vapor. As you are operating with machines this will not have any or almost no change in your earnings, what you have to observe (since it will make a comodo with the machines) would be the air temperature, this is important for performance regulation and if you take no measure the potential of the machines can be compromised and you can earn well less than intended.