Lennox 45C51 Fan Blade

When you are handling a high-demand condenser call, the Lennox 45C51 Fan Blade (interchangeable with 45C5101) is the exact OEM spec required to restore critical airflow. This is a 24-inch diameter, 4-blade propeller designed with a 26-degree pitch to optimize heat rejection across the coil without overloading the motor. Featuring a 1/2 inch bore and clockwise rotation (CW) facing the discharge, it provides a precise hub-to-shaft fitment for Lennox, Armstrong, and Ducane units. This HVAC replacement fan blade is balanced to minimize vibration, protecting the motor bearings and reducing decibel levels during peak operation. Whether you are performing a condenser fan blade replacement or a full system overhaul, using this Lennox 45C5101 24-inch fan ensures the static pressure and CFM match the original system design. Built from high-strength galvanized materials, it resists corrosion in harsh outdoor environments, making it a reliable 24-inch 4-blade propeller for residential and commercial applications.

• OEM Compatibility: Exact drop-in replacement for Lennox 45C51 and 45C5101, eliminating the need for field modifications.
• Optimized Airflow: The 26-degree pitch ensures maximum CFM delivery to maintain system head pressure within safe limits.
• Vibration Dampening: Factory-balanced blades extend the service life of the condenser fan motor by reducing shaft wobble.
• Direct Fit: The 1/2" bore and fixed hub on the discharge side ensure the blade is positioned correctly within the fan shroud.

What is the rotation of the Lennox 45C5101?
This blade is Clockwise (CW) when facing the discharge side. Always verify rotation against the existing motor and blade before installation.

Will this fit any 24-inch condenser?
While the 24-inch diameter is common, you must confirm the 1/2" bore size and the 26-degree pitch to ensure it matches your motor’s torque and RPM rating.

Is the hub included with the blade?
Yes, this 4-blade assembly features a fixed hub designed for a standard 1/2" motor shaft with a flat side for the set screw.

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.