On ours I found that on the main center ac ceiling unit in front of the fridge on the right side (bunk side) there was a vent that you could open and close. When it was closed the air flow out of the small round vents was great. When it was opened the flow kinda sucked.....lol. Basically when it is closed it forces all the air through the small ceiling vents which can turn btw. We had the same issue and also when it is closed the sound level goes down a lot . Hope that helps
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2014 Bullet 308BHS
2013 Ram 1500 5.7Hemi, 8 Speed, 3.92 gears LSD, CC, 4x4
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