That's a lot of chickens!
Are there more adult birds?
What are the dimensions of the coop floor?
Heat lamps are dangerous, better to get heated waterers.
They still need good ventilation in winter.
Good that you put the longer roof overhangs up top, that will help protect the monitor vents.
Did you build from plans?
Why divided?
How many birds will you have?
Oh, and.... Welcome to BYC! @Chickensandchicks
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general geographical location to your profile.
It's easy to do, and...