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Genuine OEM Trane WHL02915 squirrel-cage blower wheel. This wheel spins inside the blower housing to push heated or cooled air through your ductwork — a cracked, bent, or debris-caked wheel causes weak airflow, vibration, rattling noise, and reduced heating and cooling output. Precision-balanced factory replacement restores rated CFM and quiet operation for your Trane air handler or furnace.