one of the cages is a 421D and the other is a 421T. I have the 421D on top of the 421T. I have a two probe thermometer from big apple herp in each cage monitoring my temps, the readouts on both are pretty consistent. The ambient temp in the room is about 68 degrees throughout the day and night. There is a fan in the room, but it is never on and the window is never open. The cool side of the cage is about a foot away from the window and outside wall. I know this is not recommended, but unfortunately these cages cannot go anywhere else in the house. I have tried to cover that side of the cages to minimize any draft to might be coming in and also put an extra curtain on the window itself. I will try and plug the flexwatt into the wall directly to see if I can bump up the heat that way. Other than that, I'm not sure what else I can do.

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