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The Bard S143-161 Upper Intake Fill Plate Assy. is an OEM internal sheet metal air intake block off component used in certain Bard wall mounted HVAC units to close gaps at the upper intake area and help maintain the intended airflow path across the unit. Replacing a bent, missing, or corroded fill plate helps prevent air bypass, reduces unwanted recirculation, and supports proper filtration and coil performance by keeping intake air moving where Bard designed it to go. As a genuine Bard part, S143-161 is built for correct fit and alignment with the factory intake opening, making it a dependable choice when you want the unit reassembled to original airflow and service clearances after inspection or repair.