This is a tough subject. The chameleon community highly stresses and follows an open-air enclosure convention with cages that are mostly screen or PCV mesh. However, for those of us that have dry climates, this can make keeping humidity up pretty much impossible without closing in our cages, which is something we have always been taught NOT to do…
How can we find a happy middle..?
I am going to try something new. I am completing construction on a new enclosure that will have removable Plexiglas outer panels. These are located on the sides and top. There are smaller vented areas (one in front and one up top) to allow appropriate airflow. To increase humidity, they can be left on. To provide open-air, they can be easily removed. Optimally, they can be kept on during the low-humidity months, and kept off during the humid summer months. A ProMist system will provide moisture and humidity without completely soaking the enclosure.
There will still be half by one inch PVC wire mesh on the inner-frame of the cage to keep in the chams when the panels are off, as well as providing a medium for pothos and other vines to grow on, and of course, in case a cham wants to walk on the sides of it’s cage. The lower 10 inches of wall space will be glass to prevent crickets from reaching the upper mesh areas.
Two 20-watt T12 reptisun 5.0 bulbs will be mounted inside the enclosure, but right above the ceiling mesh so that the chams cannot reach it. I will post some pictures and let you know how this cage works out. It should be up and running this month some time.