Coop and Run Size for 10 chickens?

[aart]

This is maybe a silly question, so my coop is going to be in the barn and will have windows on 3 of its walls that are covered in hardware cloth. Do I need to make covers for those windows? Because I've read on here that ventilation is important in the winter but to prevent drafts in the coop. Since the coop is going to be in the barn there will be no drafts so can I leave the windows uncovered as well? I mean like a shutter that can be placed over the hardware cloth opening of the window. Just realized since the coop is inside I probably don't need a cover/shutter?

It's hard to assess ventilation/draft issue over the internet.
We don't know the size of the barn, what it looks like, where the coop is in relation to these windows, or what the coop looks like.
Some pics might help.
But you'll probably just have to wait and see by observing the air movement inside the barn near the coop. Stand inside during a as windy as heck day and observe.
Having some large pieces of cardboard available would be good, I find it handy to tack up to redirect airflow during the winter.