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Bard part 143-226BX is an OEM fill plate supplied boxed, used on Bard wall-mounted HVAC equipment to close off a cabinet opening and restore the proper barrier between compartments for correct airflow control and protection of internal components. A properly fitted fill plate helps prevent air bypass and unwanted infiltration that can lead to nuisance issues like poor performance, moisture intrusion, or rattles from loose panel areas. This is a genuine Bard replacement part intended to match factory fit and mounting points, making it a practical choice when a plate is missing, bent, or damaged during service; confirm your unit model and parts list to ensure 143-226BX is the correct fill plate for your exact configuration.
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.