That being said, I now live in North Dakota, where we go into the negatives in the winter, for weeks at a time. So, I just installed a Comfort Cozy radiant wall heater... it doesn't operate on the floor, has a zero clearance back, even though I have it on a frame that keeps it several inches away from the coop wall, so it is above the level of the chickens' access. It is plugged into a ThermoCube tap, that doesn't allow it to activate until it goes below 45F.
What part of NoDak are you in? I'm a little ways out of Minot. I wanted to ask about your set up... Is Comfort Cozy the same as Cozy Coop? How warm does it keep it when it's really cold? I usually don't heat the coop but this year I have some young peafowl and one is pretty small so I was thinking of giving them something to warm things up a little. The coldest I have seen on my thermometer in the 30 years I have been here is -38F (don't think it was windy at the time, but still pretty chilly!)