Acme Bakery

[Mr Fixit]

Well Steve, I am of the opinion that it is a permanent ventilation opening, with various screens and control baffles to supply clean fresh air into the bakery without birds, bugs, dirt, dust, leaves, litter, vermin and people coming in as well.

A bakery is a hot place and is producing food so you need a supply of fresh air so people can work unimpeded and so your product doesnt get contaminated.

I am ignoring the open doorway, but at least a door can be shut if an ill wind is blowing.
Mark