We try to keep the door open about 2"-3" and have a small oscillating fan that sits on the floor in front of the room to help put a little bit more air in there...sorry, that's all I got!
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Dan
'24 GMC 2500 AT4X AEV Edition
Thanks for the suggestions. To solve the problem for now, I partially closed an air vent in the bedroom and that directed more air into the bunkhouse. Adding this issue to my punch list for the service department.