Yes in the summer you want a breeze .
This is my coop at the bottom ..in the summer open and breezy
in the winter covered with plastic for warmth
https://www.backyardchickens.com/articles/our-chicken-coop-gors-through-changes.69334/
Hello , I like Ventilation windows up on the front top of the coop , They should be open most all of the time .
To just add more fresh Air when it is hot ..put it on the 2 sides at least ..Leaving the back closed ( may be more insulating) or Put one on the back also if you want .
Windows can...