Reznor 55681 Motor

The Reznor 55681 Motor is a high-performance direct drive blower motor specifically engineered for Reznor unit heaters and commercial HVAC systems. This OEM replacement motor features a 42Y frame design, operating at a nominal 1140 RPM to ensure consistent static pressure and optimal thermal distribution. Built for the rigors of mechanical rooms and industrial environments, the 115V 1/8 HP motor utilizes a permanent split capacitor (PSC) design for enhanced electrical efficiency and simplified field wiring. With a 1/2-inch flat shaft and open air over (OAO) enclosure, this single-phase motor provides critical cooling airflow for heat exchanger assemblies. HVAC technicians rely on the Reznor 55681 for precise drop-in compatibility, maintaining factory-spec performance in forced air heating applications.

• Universal HVAC Integration: Matches standard 115V AC electrical specs for rapid onsite installation in various Reznor gas-fired units.
• High-Torque Performance: The 1/8 horsepower rating delivers the required torque for blower wheels without overheating under load.
• Rugged Build Quality: Features automatic thermal overload protection to prevent stator winding failure during system spikes.
• Precision Airflow: The 1140 RPM speed is calibrated for unit heater fans to maximize BTU output while minimizing operational noise.

What is the shaft size of the Reznor 55681?
This motor is equipped with a 1/2" diameter flat shaft, approximately 2-3/4" in length, ensuring a secure fit for standard blower wheels.

Does this motor require a run capacitor?
Yes, this PSC motor requires a 5 MFD / 370V capacitor for proper start-up and running efficiency.

Is the rotation reversible in the field?
The Reznor 55681 typically features a fixed rotation (CCW lead end); always verify the rotation of your existing blower wheel before mounting to ensure correct airflow direction.

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.