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Bard 143-230BX is an OEM hood block off plate supplied boxed, used on select Bard wall-mount HVAC units to close off the outdoor hood opening when that hood intake or discharge configuration is not being used for the installation. In the field, this plate helps keep airflow routing correct, reduces unwanted outside air infiltration, and supports proper unit operation by sealing an unused hood path so the system can maintain intended ventilation and pressure balance. As a genuine Bard replacement part, 143-230BX is the right choice when replacing a missing, damaged, or incorrectly configured hood block off plate. Confirm fit 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.