I've been looking local for the past couple days for the ceramic emitter with no luck. I guess I'll have to order on the internet, but was hoping to have it for this cold snap. I put in the 250 watt red heat bulb and left it run all night. It was -15 F (without windchill) last night and the coop stayed a balmy -2 F inside with the heat bulb and the birds seemed fine this morning. I have a heated base for my water and it still had a thin layer of ice on it this morning. Forcast high was -5 for the next couple days.
for those 10 F to 20 F days ahead.