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The Bard 917-0221BX is an OEM coated coil assembly supplied boxed for service replacement in Bard wall-mount air conditioner applications. This coil is a critical heat-transfer component that helps the system pull heat and moisture from the air stream, so replacing a leaking, restricted, or heavily corroded coil can restore proper capacity, airflow performance, and compressor protection. Because coil assemblies can vary by unit size and refrigerant circuit details, confirm the full model and serial of your Bard unit (and the parts list for your specific revision) before ordering to ensure correct fit and connections.
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.