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The Bard 127-434BX Base Assembly (Boxed) is an OEM support base designed for Bard wall-mounted HVAC equipment to help provide a stable, level mounting foundation during installation or replacement. A correct base is important for keeping the cabinet properly supported and aligned, which helps maintain clearances for airflow and supports consistent drainage where the unit and mounting hardware are designed to manage condensate. Use this Bard factory part when the original base is damaged, corroded, or missing, and confirm compatibility by matching the part number to your unit model and serial information 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.