my ac ducting went to no where in many places,, the light fixtures were cold,, Dutchman had smashed out a portion of the duct behind the TV to put in the AC and dc wires down to the converter,, the wall was cold,, using a thermal gun and a USB camera and laptop I looked around inside,, that being said, I also pulled down the vent under the unit, and there was a piece of rubber that went between output and input,, I had to retape that, and all the ducting to the ceiling, I also foamed places that didnt go anywhere ( Like the put an H ducting in my ceiling and one two legs had ducts cut in,, works better but nothing like taking a 12 inch output and jamming it into 2 inch ducting, like blocking the output of a fan,, no air.. Good luck...
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