So here is my Coop. It is the back section of the shed, 8ft X 16ft. Right now we have the door open all day and the window is open all the time (with hardware cloth on the inside). My husband and I keep going back and forth on the ventilation issue.... he was thinking of of putting some sort of a ceiling vent in as well as 2 or 3 vents on the front (the door side). The window is set that we can leave it open just a few inches for ventiltion in the cooler months. We cannot put a vent on the back wall, there is a 3 foot closet in the shed for my chicken supplies! Will this be enough? I have seen these exhaust fans that i was thinking of for the ceiling vent, would that be better??