Ok, I'm building a new coop this week and I need some feedback on gravity ventilation. If I understand it correctly, the warm air rises, then as more warm air rises, it pushes it down the roof line and out the vent. Maybe I'm way off-base on that, but that's how I understand it. So, if my theory on it is correct, then can I leave space between the rafters between the top of the wall and bottom of the roof open (with hardware cloth over it) on a shed-style roof and have the warm air circulate out? I am planning on the roof being clear plastic to bring in more light and want to make sure I don't create a greenhouse effect that I can't ventilate.