I have been using the Big Apple misting system for my redfoot enclosure for about 18 months now. I have a relatively big L-shaped enclosure measuring 2.4 m on one side and 1.6 m on the other, with 80 cm depth (see picture below). I have the misting nozzles installed along the front sides of the enclosure, 3 of them on the longer and 2 on the shorter side. I use the shortest misting cycle (1 min.) every 2 (winter) to 3 hours (summer).
With my enclosure being pretty much closed (acrylic glass dome) I achieve a 20% higher humidity level in the enclosure over ambient.
My substrate is cypress mulch.

While my redfoots were hatchlings I filled their hide houses with moist spaghnum moss, which was very efficient in providing local higher humidity. They were in a much smaller enclosure at that time, which I hand-misted twice a day.

Gaby