I am not thrilled with how i keep my water unfrozen.......
Last year i used a stock tank deicer that is safe to touch plastic, and put it in a small (foot and a half diameter i think) black rubber horse feed dish.
That worked because when my power went out 1. You can kick that black plastic...
I love the fact that I just insulated my coop, because before I insulated it, the coop was very drafty! I have a great deal of wind, and even though ventilation is good, gusting ice cold blasts are bad.
Other than that, I totally agree with Hokum Coco. And maybe Hokum Coco has better built...