Unlike you, I don't have the HW heater under the bunks. But I do have the small fridge to the outside kitchen that also puts out a lot of heat.
I find that the bunk room air is manageable when I leave the outside kitchen open but when not, I use a Holmes 8 inch circulating fan and it does the trick of moving air around.
Probably the only hiccup/complaint I have about our unit. Aside from the fact that it runs out of beer quite often. Have to find a better solution for that.
2018 Jay Feather 29QB Pushing a 2018 Ford F-150 3.5 EcoBoost and Max Tow Pkg.
Carlos, Andrea, Daniel, Julia and Joy the Greyhound.
I don't have a PhD, but my DD-214 is worth much more.
Live, so that when your children hear the words “Ethics,” “Integrity,” “Honor” or “Trust,” they think of You!