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The Bard 5051-221BX reheat coil (boxed for service) is an OEM heating coil assembly used in Bard HVAC equipment to add controlled heat to the airstream for comfort and temperature stabilization, such as during reheat operation. When a reheat circuit is failing, leaking, or no longer delivering the needed temperature rise, replacing the coil with the correct Bard part helps restore designed airflow heating performance and proper system operation. Because fit and connection details can vary by unit series and voltage or heat configuration, confirm compatibility by matching 5051-221BX to your Bard model and serial tag or the appropriate Bard parts list 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.