Lennox 99K45 Fan Blade

The Lennox 99K45 HVAC replacement fan blade is a heavy-duty 24-inch condenser fan blade designed for critical airflow management in residential and light commercial outdoor units. Featuring a 3-blade propeller design with a 1/2 inch bore diameter, this component is engineered for precise balance and optimal static pressure performance. This part identifies as a direct replacement for Lennox 99K4501, ensuring a drop-in fit for specific Lennox AC and heat pump units. When replacing a damaged condenser fan blade, maintaining the original pitch and rotation is essential to prevent motor fatigue and ensure efficient heat transfer across the coils. This aluminum-constructed blade provides high-tensile strength and corrosion resistance, minimizing vibration and noise levels during high-load operations. For technicians performing condenser motor repairs, verifying the CW or CCW rotation against the motor specs is recommended to guarantee peak volumetric flow rates and system longevity.

Key Benefits

• Direct OEM compatibility with Lennox 99K45 and 99K4501 part numbers for reliable installation.
• Optimal airflow efficiency provided by a 24-inch diameter and 3-blade configuration to maximize heat rejection.
• Precision-balanced construction reduces mechanical stress on the motor shaft and bearings, preventing premature failure.
• Durable 1/2" hub ensures a secure fit on standard PSC and ECM condenser motors.

Common Questions

Is the 99K45 interchangeable with the 99K4501?
Yes, the 99K45 and 99K4501 are functionally identical and share the same technical specifications for fit and performance.

What causes a condenser fan blade to require replacement?
Technicians typically replace these blades due to stress fractures, corrosion, or imbalances caused by debris, which can lead to excessive unit vibration.

Does this blade include the set screw?
Standard Lennox replacement fan blades generally include the necessary set screw for securing the hub to the 1/2 inch motor shaft.

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.