So I have just bought a brand new 2019 331 with the whisper quiet in the main living area and the good Ol noisy unit in the bedroom. Well at least I can sleep in the cool bedroom but the rest of the unit is terrible. I only have 4 supply vents and the 2 return vents. I removed one of the return vents and I could barley fit my fingers in between the 2 foam panels. I plan on doing all the mods to the return duct and the supply vents I have read about and see what happens.
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