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Bard part number 5152-099 is an OEM blower wheel designed to restore proper indoor airflow on Bard wall-mounted HVAC equipment when a worn, damaged, or out-of-balance wheel is causing reduced CFM, noise, or vibration. This wheel is specified for counter-clockwise rotation and a 1/2 inch bore with an approximately 10.75 inch diameter, making correct match-up critical for blower performance and motor loading. Replace it when the squirrel cage is bent, the hub is worn, or debris and corrosion have compromised the wheel, and verify rotation and bore size against your unit model and existing assembly before ordering to ensure proper fit and safe operation.