Looks pretty good.
How is it attached?
You can put it on the other side, can always damper/baffle it for winter if needed.
https://www.backyardchickens.com/articles/ventilation-baffling.75434/
Not likely.
Might depend on how big coop is and how many birds.
Dimensions and pics of coop, inside and out and all around, would help immensely here.
North or South?
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