I have to chime in and also agree with zina and art. I had the 18” cube exo for a little bit when I first got my boy thunder and while it did the job for a
but it was a constant battle because the humidity would be fine maybe for a day or even a few hrs and then it would fall. I was using reptchip and I would get it good and damp but still between the screen the air flow the he’s the lamp it was like everything was working against it.

I didnt try a CHE which I hear does help things a bit so if you are dead set on the exo def try a che. They are heavy as another member said as well so factor that. Some folks use them and love them but they live in areas such as Florida where the real weather mimics what the snake needs already. Look up a user aeries he has tons of them but again it’s florida so it’s very different. Here in NY temps and humidity are allll over. I went with pvc enclosures because I was worried what if I wanted to take my kids away for a long weekend my humidity would be rock bottom and I couldn’t have that on me and enjoy my snake and my life.