Starting to prepare a shed I have into a coop. It is an attachment to a larger shed, therefore the back wall of it can't be vented (where it's against the other building). That is the south side. So I can vent the north, east or west sides. I came across this today: "if summer heat is not a big problem where you live, then you will most likely be fine if you build at least 1 sq ft of vent opening per chicken, or (if you want a lower but therefore less-conservative number) 1 sq ft of vent opening per 10 sq ft of floor area. " (from https://www.backyardchickens.com/web/viewblog.php?id=1642-VENTILATION) Can anyone vouch that much venting is appropriate? I was thinking of using floor registers, but that would be an awful lot of them. I live in west MI - winds not usually bad where I'm at (forested area), but when windy its from the west usually. In summer I will be able to open the big screen on the storm door I'm installing to the front (north side) of the coop for the 'people entrance'. Light will be coming in from that front side through the storm door window and the full length glass doggie door panel I'm restructuring to be the 'chicken entrance'. No light from the east/west sides save for whatever the vents let in. Would truly appreciate all your thoughts and suggestions on the plan so far and how I ought to go about the venting. My coop will comfortably hold a max of 22 chickens. It's about 8X11. Will be doing a deep litter method. So far only 9 chickens. I'll attach a pic to help - (digging in a deep trench around edge of 1/4"hardware cloth to keep out critters, and putting up osb for more insulation). You can see the amount of venting and light they'll get with the storm door and doggie door.