Our humidity is pretty low here. The Herpstat probes are 2" from the floor of the cage and the top of the Xikar units are 2" from the ceiling. Both the probes and the Hygrom's are mounted on the back wall, within 6" of the right side wall. The RHP unit is a 65 Watt unit from Pro Products and is mounted on the left side of ceiling approx 2" from the side and is roughly 18" wide.
I am setting the Herp probe temps for the cool side and now have the temps set at 80 degrees. I am going to leave the doors partially open thru the night and see where my readings are in the am. I think it is going to take a few days to get temps / humidity dialed in. The mulch was pretty moist when I put it in the cages.
I am not sure why the temp difference between the Probes and Xikar units, however, the difference tonight is closer to about a 5 degrees.
I plan to pick up a temp gun tomorrow so I can take some accurate readings on the mulch on both ends of the cage and then I can compare readings from there.