So I'm here in Northern Ontario, Canada, it gets pretty darn cold up here. Like -30 celcius is not uncommon. I have a wooden 8x12 shed I've converted to a coop. I'm gonna be insulating it for the winter. I'm wondering how much ventilation I need, If i can close up the ceiling, and maybe put a vent. I guess I really need to know the balance between, keeping warm and air exchange. I also figure I'm gonna have to heat it somehow maybe. I'm hoping to have about 60 RIR's in there for the winter.