Modine 5H0749730001 Fan Blade

The Modine 5H0749730001 Fan Blade is a precision-engineered OEM replacement fan designed specifically for Modine unit heaters, including the popular HD45 and HDS45 series. This 10-inch diameter propeller is built for high-efficiency thermal management, featuring a 38-degree pitch and a 5-blade configuration that ensures consistent static pressure and optimal CFM delivery. The clockwise (CW) rotation and 3/8-inch bore provide a direct-fit interface with standard motor shafts, allowing for rapid field replacement without modification.

As a direct successor to the 5H74973-1, this component is manufactured from durable aluminum to resist corrosion in demanding commercial and industrial environments. Technicians should verify rotation and hub size before installation to maintain original equipment specifications and ensure balanced operation. Relying on genuine Modine parts prevents premature motor bearing wear and maintains the integrity of the heat exchanger’s airflow patterns.

Key Benefits

• Exact OEM Match: Direct replacement for part number 5H74973-1, ensuring zero-clearance issues in Modine HD45 and HDS45 units.
• Optimized Airflow: The 38-degree pitch is calibrated for maximum heat transfer efficiency across the unit heater's internal coils.
• Industrial Durability: Solid aluminum construction provides long-term resistance to high temperatures and corrosive atmospheres common in shop settings.
• Easy Installation: Features a standard 3/8-inch bore for a secure fit on compatible fan motors.

Common Questions

Is the Modine 5H0749730001 compatible with older Hot Surface Ignition (HSI) models?
Yes, this fan blade is the correct specification for both older HSI and newer Direct Spark Ignition (DSI) versions of the HD45 and HDS45 unit heaters.

What happens if I install a fan blade with a different pitch?
Installing a blade with a different pitch than the specified 38 degrees can lead to motor overloading or insufficient airflow, potentially causing the high-limit switch to trip.

How do I determine the rotation for this Modine fan?
The 5H0749730001 is a Clockwise (CW) rotation blade, determined by looking at the discharge side of the fan assembly.

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.