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Bard part 506-277-XBX is an OEM top assembly used on select Bard wall mounted HVAC units to restore the factory top cover and help protect internal components from weather and debris while maintaining proper air path and unit integrity. Because 506-277-XBX ends in -XBX, it is an EXTERIOR CABINET COMPONENT finished in Beige textured enamel to match factory units, and you should ensure this matches the color of your Bard unit for seamless replacement. Bard exterior panels with enamel cabinet paint coating have been tested to withstand over 1000 hours of salt spray tests per ASTM B117-03. This listing is for the panel only. Reuse your existing fasteners, clips, and hardware.
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.