Lennox 21620 Wheel

For field technicians and mechanical contractors tasked with restoring airflow in Lennox residential or light commercial units, the Lennox 21620 Blower Wheel is the direct OEM solution for maintaining static pressure and system efficiency. This blower wheel features a 10-13/16 inch diameter and a 6-1/16 inch width, engineered specifically for clockwise (CW) rotation applications. Constructed from high-grade galvanized steel, it is designed to withstand the thermal stresses of continuous furnace cycles and heavy cooling loads without deformation or eccentric oscillation. The precision-balanced blades reduce vibration, extending the service life of the blower motor and preventing premature bearing failure. Whether you are performing a seasonal overhaul or an emergency repair, utilizing a genuine Lennox replacement wheel ensures the fan assembly remains within factory specifications for CFM delivery and decibel ratings. Verify the shaft bore size—typically 5/8 inch for this configuration—against the existing motor hub to ensure a seamless fit during installation.

• Precision Galvanized Construction: Resists corrosion and maintains structural integrity in high-humidity evaporator environments.
• Optimized Airflow Dynamics: Engineered specifically for Lennox HVAC systems to maintain nominal CFM and static pressure performance.
• Reduced Mechanical Noise: Factory-balanced design minimizes harmonic vibration and operational noise levels across all fan speeds.
• Direct OEM Compatibility: Eliminates the guesswork and modification risks associated with universal furnace blower wheels.

What is the rotation direction for the Lennox 21620?
This wheel is designed for clockwise (CW) rotation. Always verify rotation from the back of the motor or the hub side to ensure correct airflow direction.

How do I measure for a replacement Lennox blower wheel?
Measure the overall diameter across the fins (10-13/16") and the width of the wheel (6-1/16"). You must also confirm the bore diameter of the hub to match your motor shaft.

Why is my blower wheel causing the furnace to vibrate?
Vibration is often caused by dust accumulation leading to an unbalanced state or a bent blade. Replacing a damaged unit with an OEM Lennox 21620 wheel restores the factory balance.

This item is not eligible for free shipping.

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.