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The Bard 5070-043BX wheel assembly (ERW-1525B-X22) is an OEM replacement blower wheel assembly used in select Bard ventilation cassette and wall mount HVAC configurations to move air smoothly through the cassette for proper airflow and balanced system performance. If your unit has reduced airflow, unusual vibration, or a noisy wheel, replacing the wheel assembly can help restore steady air delivery and protect related components from excessive strain. Match this Bard factory part to your unit model and serial to confirm correct fit before ordering.
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.