Lennox 78L01 Fan Blade

The Lennox 78L01 Fan Blade is a critical OEM replacement component designed for high-efficiency outdoor condensing units and heat pumps. This 18-inch diameter condenser fan blade features a robust 4-blade configuration with a 26-degree pitch, engineered to provide optimal CFM while maintaining low acoustic signatures during high-load operations. Built for precision, the 78L01 utilizes a 1/2-inch bore diameter and is indexed for clockwise (CW) rotation, ensuring seamless integration with standard 48-frame motors typically found in Allied, Armstrong, and Ducane residential systems.

When swapping out a damaged or unbalanced propeller, identifying the Lennox 78L01 replacement part is essential for preventing premature motor bearing failure caused by vibration. This HVAC fan blade 4-blade 18-inch assembly is manufactured from heavy-duty materials to resist corrosion in harsh outdoor environments. Techs should verify the 78L0101 and Revcor R44931-001 cross-references to confirm a drop-in fit. Integrating this condenser fan blade 1/2 bore into your service call ensures the system restores factory-specified head pressure and heat transfer efficiency.

• OEM Precision: Direct replacement for Lennox 78L01 and related part number 78L0101, eliminating the need for hub modifications.
• Optimized Airflow: The 26-degree pitch is calibrated for 18"DIA 4BLD 1/2"bore Fan Blade specs to maximize heat dissipation from the condenser coil.
• Durability: Engineered to withstand the rotational stresses of high-static environments without blade flattening or pitch deformation.
• Universal Compatibility: Fits a broad range of units from the Lennox family, including Concord and Magic-Pak models.

• What is the rotation direction for the 78L01? This blade is designed for clockwise (CW) rotation. Always check the motor rotation before installation to ensure proper airflow direction.
• Does this blade include the set screw? Most OEM fan blades come with a pre-installed hex head set screw for secure attachment to the 1/2-inch motor shaft.
• Can I use this for a 5/8-inch shaft motor? No, this blade specifically uses a 1/2-inch bore. Using an adapter is not recommended as it may lead to balancing issues and equipment damage.

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.