Just to point out something you have missed. RH does not measure how much water is in the air. It is only how close or far you are from the saturation point of air. The saturation point changes with temperature.
Lets take 55% rh @ 75 degreesF is 11gm of water per cubic meter
55% rh at 85 degrees F is 16 gms of water
55% rh at 0 degrees F is 0.5 gm of water.
The point is (slightly off topic) that 50% may produce perfect sheds at a touch higher ambient temp than 50% at a lower ambients.
My 12 snakes are are kept at 50%-55% RH inside the enclosures they all shed perfectly with no misting. I do not heat my snake room and it takes 85% rh to hold 55% in the enclosures.
The kicker is that the amount of water in the air is basically the same. The only difference is 15-18 degrees different.
That is also why the Arctic is a desert it is too cold to have any water in the air.
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