I think that RH is over emphasized. My CP grow in humidity around 60%
and do very well. The only plants that I always keep in extremely`
(i.e. near 100%) high humidity are _Nepenthes_, and this is after having
seen how my local _Nepenthes_ guru Michael Chamberland grew his. Oh,
_D.schizandra loves ultra-high humidity.
As you pointed out, the RH of air with a certain water content changes
with air temperature. You are familiar with the perhaps more useful
concept of the "Dew point"?
B