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Bard 165-591-4 is an OEM cabinet sheet metal component used in Bard wall-mount HVAC equipment, identified in service parts documentation as a plenum angle assembly that helps form and support the internal air path where the filter rack and related ducting sections align. Replacing a bent or missing angle channel helps the filter rack and panels seat correctly, which reduces air bypass around the filter and keeps airflow directed through the intended return path for more consistent system performance. This is a direct-fit Bard replacement part intended for proper alignment and structural support within the unit, so confirm the part number against your unit model and parts list before ordering.
* Orders less than $50 may incure a minimum order fee.