Mestek j34r06999-105 Fan Blade Propeller Xf Series

Product Description

The MESTEK j34r06999-105 is a replacement fan blade propeller designed for use in XF Series unit heaters rated at 175K and 350K BTU/h. This component moves air across the heat exchanger to deliver conditioned airflow into the space. It is a direct mechanical replacement intended for technicians servicing MESTEK and Sterling-branded unit heaters in commercial and industrial heating applications. Proper airflow performance depends on a structurally sound, correctly pitched blade, making this a critical replacement part when blades show signs of damage, imbalance, or wear.

This fan blade propeller is specifically called out for XF Series unit heaters at the 175K and 350K BTU/h capacity ratings. These unit heaters are commonly found in warehouses, garages, manufacturing facilities, and other large-volume commercial or industrial spaces where forced-air heating is required. Installation is performed by qualified HVAC technicians during routine maintenance or as part of a component-level repair on an existing unit heater assembly.

Key Features

• Direct replacement fan blade propeller for XF Series unit heaters
• Compatible with both 175K and 350K BTU/h capacity models
• Designed for forced-air unit heater applications in commercial and industrial settings
• OEM-specified part number ensures correct fit within the XF Series fan assembly

Compatibility

Specified for use with MESTEK XF Series unit heaters at 175K and 350K BTU/h capacity ratings.

Installation Notes

Installation should be performed by a licensed HVAC technician. Before servicing the fan assembly, disconnect and lock out all electrical power to the unit heater in accordance with NFPA 70 (NEC) and local codes. Ensure the replacement blade is fully seated and secured on the motor shaft before restoring power. Do not operate the unit with a damaged or improperly mounted blade, as imbalance can cause premature motor bearing failure.

Technical Specifications

• Application: XF Series Unit Heaters, 175K and 350K BTU/h
• Component Type: Fan Blade Propeller

Standard Information

• Brand: MESTEK
• Manufacturer Part Number: j34r06999-105