Temperature gradient

Update after further tweaking the temperatures, I think maybe the closest to ideal I could get is 91-92F for the warm hide surface temperature, with an 87-88F ambient temperature. With the warm side at these temperatures, the cool side ambient and surfaces range from 77-82F. The ceiling of the cool hide is 82F (seems like the hide material absorbs heat) and the bedding under the cool hide is 77F, while the ambient is around 80F.

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Originally Posted by Luvyna

I have a PVC enclosure that is 4 ft wide, 2 feet deep, and 18" tall, heated with an RHP. I unfortunately don't know if a UTH is possible with this set up because the bottom of the enclosure seems too thick for heating to pass through.

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I'd give it a try. I would expect it to take a while for a heat mat to warm through pvc sheet, but, once it had, the heat mat should be able to maintain the temp.