Was wondering if anyone has tried this. I have had my chickens since April, I bought them as chicks. They started laying 2 weeks ago. They are Australorps. I live in the north easy (New York State) and we do get some brutal temperatures in the winter. I am looking to keep the coop around 40 degrees, as I have read time and time again that the chickens do not need heat, and that this bread is decently cold hardy. The coop is about 4'x4'. In the summer on unusually hot days (95+ this year with no rain and nothing but sun.) The coop wouldnt stay under 90 degrees even with the window open and 120cfm fan. I opted for a week to pipe cold air from my air conditioned basement via dryer duct (new, of course) to the coop via a fan running around 50cfm. (not a direct connection from the furnace) This kept the coop around 75 degrees, and the chickens seemed to love every minute of it. I was wondering if I could do this for heat as well, on days/weeks were it will be colder than 25 degrees outside. I should be able to keep the at at least 40 degrees. Has anyone used heat/ac from their home to climate control their coop? Am I insane? My other though is to install a reptile heating pad underneath the nesting box, under the laminate flooring, and put it on a thermostat to not kick on unless its 30 or lower outside. (My coop has laminate flooring that was leftover, it cleans up real easy) This way they could at least lay in the nesting boxes together if it gets too cold, and not loose their feet?