Huh.
I usually set my exhaust fan to turn on at 60%rh and my humidifier (if I use it) to turn off at 55%rh. I keep my upper and lower canopy fans going 100%, but you want the RH to be up, but that’s why you want LOTS of indirect airflow.
You want a sealed climate, so a grow tent or you can rig up a tote if it’s a small enough batch or something.