Quote:
Originally Posted by cabmando
You can't mess things up by shortening the return duct. You can only mess it up by restricting it. The only thing you might get by shortening the duct is some whistling or vibration through the return vent. If it does this just take a pair of needle nose plyers and open the louvers a bit.
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in a perfect world totally correct
but in the early pictures in inside the bent restricted ducts red area
sure would flow better if longer sweeping curves and less crushed joints
but I still suspect a monster dust-bunny is lurking behind a turn near the air to the box red area
as 24'' ducts should flow no matter how twisted or bent