I haven’t found a temperature rating on their website. Do you know how cold it can be and still function properly? What’s the coldest temps you’ve used it in?Not sure what you mean by coop heater option. The Sweeter Heater is an infrared radiant heat and only heats the animal under/near it and not the entire coop. I am
very happy with it. My chicks are 3 weeks old and I have just been raising the heater up as they grow. The chicks have been jumping onto the heater and I do not have to worry about them. Sweeter Heater an American Company, check out their website. SweeterHeater.com