Quote Originally Posted by Slim View Post
I yield the floor to Aaron on this one. He has much more PVC cage experience than I do. Thanks Aaron.
It completely depends on where the thermostat probe is. because the AP cages have a slot on the bottom for the thermostat probe to sit directly on the flexwatt. this means that you aren't going to get any heat build up since the probe would detect it and cut the power.

With other PVC cages that do not have a thermostat probe slot, I would agree with you 100% as heat build up could be an issue.