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Bard part 553-646-XBX is a vent option door assembly used on select Bard wall-mounted HVAC units to cover and control the outside air vent opening when the fresh-air vent option is installed. As an EXTERIOR CABINET COMPONENT, it is finished in Beige textured enamel to match factory units, and the enamel cabinet paint coating has been tested to withstand over 1000 hours of salt spray tests per ASTM B117-03 for durability in coastal and harsh environments. Ensure this matches the color of your Bard unit for seamless replacement. 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.