All those things mentioned in the AC thread help but for me i'm convinced it was the taping of the divider and most importantly the addition of a vent below the main blower. This bypasses most of the roof vents. With a 25 foot RV it's like having a window unit blowing straight out cold. Most of the cold air never reached the roof vents and what does is significantly warmer. May not work for a larger RV. Spent the day at 93 degrees in the sun and humiture over 100 and was plenty cold.
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