Yes, the one that runs into the cage. Only at night when your ambient temps drop. Then since you have lower ambient humidity you can run a cool mist humidifier in the room that the cage is in to kick up the ambient level and this will not harm the cham.
Something to remember is that your going to need to be able to set your cage up so it holds the humidity better. Hybrid cage style may be a very good option for you. Providing a lot of live plants will help as well.
This is a great site for learning correct info.
https://chameleonacademy.com/chameleon-husbandry-program-getting-started-with-chameleons/