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Bard part number 5152-028 is an OEM clockwise blower wheel with a 1/2 inch shaft bore and a 9 inch by 7 inch wheel size that fits select Bard wall mount and packaged HVAC blower assemblies. This wheel mounts to the blower motor shaft and is responsible for pulling air across the coil and pushing conditioned air through the unit, so a worn, bent, or noisy wheel can lead to vibration, reduced airflow, and poor comfort. When replacing 5152-028, confirm the rotation direction (CW when viewing from the specified end in your service literature), the 1/2 inch bore, and the 9 x 7 dimensions to ensure proper fit and balanced operation with your existing blower housing.