Lennox 20W28 Motor

As a direct-fit replacement for heavy-duty industrial air handling applications, the Lennox 20W28 is a high-performance PSC blower motor engineered for 460V, single-phase systems. This 1/2 HP blower motor operates at a nominal 1075 RPM and features a 3-speed configuration, allowing service technicians to fine-tune airflow for optimal system balancing. Identified by the manufacturer as part number 100792-02, this motor is functionally identical to the Lennox 20W2801, ensuring a seamless drop-in installation without the need for mounting modifications. Built with a 48-frame chassis and a 1/2-inch by 2.5-inch shaft, it is designed for horizontal belly-band or resilient mounting in Lennox furnaces and air handlers. To ensure peak electrical efficiency and protect the windings from premature failure, this 460V HVAC motor requires a 10 MFD 440 VAC capacitor for operation. The Lennox 20W28 motor provides the reliable torque and thermal protection necessary for sustained commercial or residential supply air performance.

Key Benefits

• Direct OEM Match: Perfectly replaces Lennox 100792-02 and 20W2801 to maintain original equipment certifications and sound levels.
• 3-Speed Versatility: Multiple speed taps allow for precise cfm adjustment based on static pressure requirements.
• High-Voltage Efficiency: Specialized 460V 1Ph motor windings reduce amperage draw in high-voltage environments compared to stepped-down alternatives.
• Rugged Construction: Features a resilient 48-frame design with sleeve bearings for quiet, consistent operation in horizontal positions.

Common Questions

Is the 20W28 compatible with the 20W2801?
Yes, the 20W28 and 20W2801 are identical components. Both utilize the same 1/2 HP, 460V specifications and physical dimensions, making them fully interchangeable for service calls.

Does this motor include a run capacitor?
No, the capacitor is sold separately. This motor requires a 10 MFD / 440V run capacitor to function correctly. We recommend replacing the capacitor whenever a new blower motor is installed to prevent service callbacks.

What is the rotation direction for this part?
The 20W28 is typically rated for CWLE (Clockwise Lead End) rotation. Always verify the rotation of the existing blower wheel and the previous motor's data plate before finalizing wiring.

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.