Lennox 21772 Blower Wheel

The Lennox 21772 Blower Wheel is a critical direct-drive component engineered for high-performance air distribution in residential and commercial HVAC systems. This 12x9 blower wheel features a 1/2 inch bore and is designed for a clockwise (CW) rotation from the hub end, ensuring precise compatibility with specific Lennox and Allied manufacturer blower motors. Constructed from heavy-duty galvanized steel, this wheel incorporates 43 blades to maximize CFM output while maintaining structural integrity under high static pressure. As a direct replacement for Lennox LB-29333BR and part number 60J30, it eliminates common vibration issues caused by off-balance or pitted blades. When performing a swap, verify the set screw alignment on the motor shaft flat to ensure a secure fit. This OEM Lennox part is built to withstand the rigors of continuous operation, providing the reliable airflow necessary to maintain heat exchanger efficiency and prevent evaporator coil freeze-ups in demanding HVACR environments.

Key Benefits

• Optimal Airflow: Engineered with 43 high-velocity blades to ensure consistent HVAC air distribution and system efficiency.
• Precision Balancing: Factory-balanced construction minimizes noise and reduces mechanical stress on the blower motor bearings.
• Broad Compatibility: Serves as a direct-fit replacement blower wheel for numerous Lennox, Armstrong, and Ducane furnace and air handler models.
• Durable Material: High-quality metallic build resists corrosion and deformation, extending the service life of the blower assembly.

Common Questions

• How do I confirm the rotation of my existing wheel? Look at the unit from the hub side; the Lennox 21772 is designed for clockwise (CW) rotation. Installing the wrong rotation will significantly drop airflow and can damage the motor.
• Will this wheel fit a 5/8" motor shaft? No, this specific model features a 1/2" bore. Always measure your motor shaft diameter with calipers before ordering to ensure a proper fit.
• What are the exact dimensions for housing clearance? This wheel has a 12-inch diameter and a 9-inch width. Ensure your blower housing allows for these specific physical dimensions with adequate clearance for rotation.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.