Okay I guess what you said hit the nail on the head, as to why I am banging my head on the wall or said nail. How do you have ventilation with out a draft? Isnt air flow from out to in and through a draft? Maybe if I can understand that, then I will know what to do, because at this point I have no clue. They seem to be doing fine. It is getting near zero or subzero every night, humidity is reading between 70 and 80 most the time. The go out in the day as long as I have straw on the snow. They are laying really well. In fact I am shocked at how much I am getting. Frostbite on the tips of most single combs, but I dont have frost on the walls, ceiling, only one window, furthest away from them gets a little sometimes.