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The Bard 553-539-5BX is an OEM ERV vent option door assembly used on Bard wall-mounted HVAC units equipped with an energy recovery ventilator (ERV) option, providing the correct exterior access and closure for the ERV vent opening so the unit maintains proper airflow control and weather protection. As an EXTERIOR CABINET COMPONENT, it is finished in Desert Brown textured enamel to match factory units, and Bard exterior panels with enamel cabinet paint coating have been tested to withstand over 1000 hours of salt spray tests per ASTM B117-03. 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.