This stays indoors in an unheated room for about 10 to 14 days just to make sure that there are no problems, then the whole setup goes into the big girl coop for look no touch. I use the MHP method I learned from this site, love love love it!
After about a week we close the coop pop hole for about an half hour or so every day ,open the little chick door on the brooder so they can explore in peace and then gradually do supervised time with the big girls.
Then after a few days we leave the chick door open all the time so they can come and go as they want and they have a safe escape route back in the brooder if needed, (the big girls generally just ignore them by now!) and by 5 weeks or so they are usually starting to try to roost with the big girls!
In fact they climb all over the roosts in the daytime like a big play frame,way before that!