Adding ventilation to the coop

[WonkierZulu]

I've installed them on commercial roofs and haven't had one leak idk it how they are designed. I'm pretty sure the Google can give a better answer of a better answer but they work great. Installed a bigger style that one on a bakery which attic was got moldy bad. It dried it all about in about a month.

 

[WonkierZulu]

People use power vents also but you have to have power or install solar powered vents. They all move air well. I like the whirlybirds(old roofer talk) no power and they self sustainable last a long time.