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Bard 542-054BX - Fresh air BOP assembly

The Bard 542-054BX Fresh Air BOP Assembly is an OEM ventilation block-off plate kit used on select Bard wall-mount air conditioners and heat pumps to close the factory fresh-air intake and exhaust openings when the unit is configured for a B vent option. It helps reduce unwanted air infiltration while adding an extra barrier against wind-driven rain, dust, and debris entering through the vent openings, making it a practical replacement when the original plates are missing, damaged, or removed during prior service. Because vent options vary by model and vintage, confirm this part number against your unit data plate and the correct Bard parts manual before ordering to ensure proper fit and sealing.


  • Technical Specifications
  • Product number: 542-054BX
  • Manufacturer description: Fresh Air BOP Assembly - Boxed
  • Weight: 2.400 lbs
  • HTS Code: "8415.90.8085"

  • Previous Versions
  • 542-054 (Obsolete, superseded by 542-054BX)

$164.00

What does the "BX" suffix mean?

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.