yeah i really dont explain things very well. Thats why i thought the stainless steel was such a good idea. When i went into home depot i only saw plastic then a light bulb went off in my head " oh yeah my hubby has a ventilation business im going to snoop around" lol so i took one of his hood to his vent and was like ah ha this is amazing! As i know mice like to hide out in the winter that whys i thought to close the damper but after reading suggestions im going to add poultry wire instead of the damper so it can be left open all year long and the picture makes it look so much smaller then what it is. The building is huge compared to the vent. I guess my chickens live in a mansion instead of a coupe. LOL

plus i didnt use any insulation so theres little cracks and such from the boards not exactly lining up so there is defiantly air flow but not enough to bother the birds.