Reznor 131970 Fan Blade

The Reznor 131970 Fan Blade is a critical direct-drive replacement component engineered for specific Reznor F125 model unit heaters. This 12-inch 3-blade fan is calibrated to maintain precise cubic feet per minute (CFM) output, ensuring optimal heat exchanger dissipation and preventing high-limit switch tripping. Constructed from heavy-duty aluminum to resist corrosion and minimize rotational mass, this replacement HVAC fan blade features a standard 1/2-inch bore diameter for seamless integration with the existing motor shaft. As a specialized industrial heater replacement part, it is designed to endure high-cycle operation in demanding warehouse or shop environments. Proper pitch alignment and balance are factory-set to reduce vibration and bearing wear on the blower motor. When performing a Reznor model F125 repair, verifying the blade orientation and set screw torque is essential for maintaining the unit's thermal efficiency and operational safety standards.

• Optimized Airflow: The 3-finned fan blade design is specifically pitched for the 125,000 BTU F-series chassis to ensure correct static pressure.
• Durable Construction: High-grade aluminum alloy prevents rust and maintains structural integrity under high ambient discharge temperatures.
• Exact Fitment: Engineered as a direct OEM-spec Reznor 131970 drop-in, eliminating the need for shaft modifications or shroud adjustments.
• Vibration Reduction: Precision-balanced blades minimize harmonic resonance, extending the service life of the motor bearings.

Is the Reznor 131970 compatible with other F-series heaters?
This specific 12-inch blade is engineered for the Reznor F125 unit heater. While it may fit other 1/2-inch shafts, the blade pitch is calibrated specifically for the F125's motor RPM and heat exchanger resistance.

How do I fix a noisy Reznor heater fan?
Loud operation often indicates a bent F125 fan blade or an loose set screw. Replacing a compromised 131970 blade restores balance and prevents catastrophic motor failure.

What is the bore size of this fan blade?
The Reznor 131970 features a standard 1/2-inch bore, designed to secure to the motor shaft via a hardened set screw for slip-free performance.

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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.