Staying warm in Sue B

Is Sue B overheated in the winter or, conversely, drafty? Just wondering what additional bedding to bring when we visit in October. Thanks!

According to my S, he kept his window open all year long in his overheated Sue B room. He had a nice down comforter that stayed bunched up under his bed all winter!. He did use a lightweight blanket and a medium weight fleece blanket during the colder months.

Very helpful @Marylandfour - thank you.