We have always shut the door on Jenna. Otherwise she just wont go to sleep.
It will be interesting to see what we do in summer when she needs the cool of the air con through there. Hmmmm.
At night we open the door so she can get out of the room if she needs to, but there is still another door that she can't get through.
We have to shut all the doors otherwise my cat would get in and chew all the fabric in her room.