Jinx3825, you are correct, almost.
When it's raining or above 90% humidity, the intake air is nearly saturated with moisture which will likely still condense in the first part of the miner before the air temperature rises above the dew point enough to be non-condensing. It only needs a surface to condense upon, not a colder surface.
The evidence for this is empirically demonstrated by the many miners which have suffered destruction due to corrosion caused by repetitive condensation formation. Counter intuitively, it is unusual for electronics to short due to condensation. Shorts are more often due to dirt and dust accumulation, although sometimes triggered by condensation.
Please refer to the Dew Point description here.
https://en.wikipedia.org/wiki/Dew_pointIf your intake air is 100% relative humidity, you only need to raise the air supply temperature about 5C to eliminate condensation formation. If you have the intake and exhaust of all your miners fully isolated, you can add a small fan to return a little of the exhaust air back into the intake plenum to provide the needed intake temperature rise. Really, you should heat the intake air whenever the humidity reaches 90% or whenever the Dew Point / Temperature spread is <5 degrees.
