I have been meaning to post this for some time. Many people struggle with how to add ventilation to their coops without creating a draft on their chickens. I admit, this was not my idea, it came from my husband, who at one time was a roofer, and helped build my coop. I wanted to share because I feel it is a way you can add ventilation to any coop. I made this diagram to help explain. Position will vary depending on your coop design, just be sure the opening is pointed down so that you don't end up with precipitation coming in. The vent can be placed on a roof or a wall, ideally it would be higher than your roost. First decide where you want to position your vent. Then cut a hole about 6 inches wide that runs almost the length of your coop wall or roof. Cut 2"x4"s to line 3 side of your hole. Attach these on the OUTSIDE of your coop. Cut a piece of plywood (or if you are clever about it, you can probably re-use the piece you cut out of your coop wall/roof) just large enough to cover the opening and attach it. It will be raised up a few inches by the 2"x4"s leaving only one side open, in my diagram it's the right side. Cover this final opening with hardware cloth to keep predators/pests from making their way in. Now you've got a draft free vent. Wind will be diffused by having to make it around a corner to get in your coop. *EDIT* Please share any ventilation pics and ideas you have here. They will certainly be useful to others. Every coop is different, there is not a one size fits all solution!