There's something wrong with what they said, as if the temp can't be below 60-ish, it's hardly worth it.Great to hear. That's what I have. The cozy coop plate. I really like that one. I emailed them and they said the ambient temp cannot be below 60 ish. But I do have heating mats to put under it covered with some construction sand as well.
Nice pics.
Those work all winter long here, when it's -40F even. They last around 5+ years being run 24/7 for 6-8 months a year. We've got four or five of them.