Just out of curiosity, you wouldn't happen to have a picture or know where I could find one? I guess it's just hard to imagine a coop with large gaps.
My plan for the coop is to have the south side open (or atleast mostly open) a window on the east (not a glass window but a window covered in hardware mesh that will have like a shutter to close if the weather gets to cold, or be able to just partially open to allow ventilation) and the human door on the west side that way there will kind of be some cross ventilation on warm/hot days, most of the air/breezes will be coming from the south (open face) and the west, since all of the areas on that side is essentially open field, on the east side not far from where the coop will be is an entire tree line/bushes that get really thick and will block winds from the east, but in the winter it thins out a bit so there may be some breeze from that side in late fall-early spring. I'm sorry if any of that is confusing, I'm not the best at explaining stuff.
It would look like this, with the following descriptors:
1. The tall side would be the front. It would face south. It would be left open as it currently is in the picture.
2. The short side would be the back of the coop. It would face north. You would wall it from the top to about 6 or 8 inches off the ground. That wall will block the winter north wind but the gap underneath would let air circulate in the summer.
3. The left and right sides would be oriented east and west. They would be walled like the back and you’d leave equal gaps on the ground like you did on the back wall. However, you would also leave a gap along the roof also 6-8 inches. That will let hot air escape the sides in the summer.
4. Inside you’d place an incline of roosting bars ascending from the front of the coop to the back.
5. You’d place your nesting boxes on the east and west walls, making sure that either the roof of the coop or the roofs of the nesting boxes hang over enough to shield the nesting boxes from blowing rain.
This style of coop is only intended to give your chickens a sheltered place to roost. It does not afford predator security beyond allowing chickens to fly out the open front of attacked at night. Security comes from either your run or free range dogs. This is the style coop I had growing up. It had a secure run but the run was left open 24-7. The dogs kept predators away and I never lot a chicken at night in the coop.