Apprentice question
Verify first
Verify before you commit. Cheap to catch now.
Sometimes a rectangular fitting can be rotated to reverse hand, but only if airflow direction, seams, vanes, access, and flanges still work. Verify before installing it.
['Some rectangular fittings can be flipped or rotated to reverse a hand, but not always. Turning the fitting may move seams, vane rails, access doors, connectors, drain slope, or airflow orientation into the wrong position.', 'Before calling it a field save, check the shop tag, airflow direction, flange pattern, vane direction, insulation, and access. If flipping creates another problem, hold for a remake or detailer-approved workaround.']