Ventilation is way more important than temps in winter...and all year.
I use a fan during summer heat waves to help bring down the temp inside coop late in day.
Got pics?
Make a coop page here:
https://www.backyardchickens.com/articles/categories/member-pages.10/
so you can share.
Oh, and.... Welcome to BYC! @Buffy Brahma Mama
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general...