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Bard part 921-0124BX is an OEM fan shroud assembly used on select Bard wall-mount HVAC units in a draw-thru condenser fan configuration. The shroud helps center and support the condenser fan and guides airflow through the outdoor coil, which is critical for proper heat rejection, stable head pressure, and efficient cooling operation. If a shroud is cracked, bent, or missing, you can see increased vibration and reduced airflow that can lead to nuisance trips or poor performance, so replacing it with the correct Bard factory part helps restore the original airflow path and fan alignment. Confirm draw-thru style and model compatibility in the unit parts manual before ordering to ensure the right fit.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.