Thanks. It works, but is kind of small. The gable vents are not that big. Hence leaving the windows and pop door open. Most days I open the egg door a few inches. Even in the dead of winter.
We have a 4'x8' raised coop. We have gable vents, a roof ridge vent, two windows and a pop door. The windows and pop door are always open as the covered run prevents rain and snow from getting in the coop. We use a snow rake to clear the ridge vent. But I would like to add more ventilation.