Okay, now it is clear. Got any pics of the actual venting. I am thinking of adding a vent up high as you have done too. Right now , my pop door is down low on the floor, litter board partition keeps the cool air from going right across the floor, this the north side facing into attached and cover run, the window is on the southside, it is up high almost to the ceiling of the coop. i want to put a vent, maybe 2 up on the ceiling level on the south side, and keep the window closed....stay warm frost brother