Questions about PVC Caging

[Tfpets]

In an insulated structure such as a PVC cage, a RHP or UTH by itself will not heat the air. But they will heat objects such as the cage itself, the substrate or a hide. Those objects will get warm and heat the air. When used in a glass aquarium this heat is easily lost, but in a PVC cage it stays. You actually have to be careful not to let the ambient temp get too high in some cases. I have opened the doors on my vision tanks on cool mornings and felt the heat and humidity come pouring out of the open door! It is amazing how well insulated they are!