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next,... the second pic...again not to be redundant , but for those learning about how not to install a rv roof ac... you will see a huge mistake that has just robbed me of about 50% of my AC's efficiency, and whats causing the low air flow at my regs. the little foam wall is supposed to block the service side(cold air) from blowing into the return air (Warmer air from coach) as you can see,.. they put the divider in the middle of the service duct,,,so what happens, as it should work... one side of the wall is pressure(cold air) and the other side is suction (warm air from coach) this is critical as that is how you get to the optimum air exchange ,.. as is... the air is just cavitating in the box
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