Broan-nutone s99100424 V-belt 3L340 Drive Belt

Product Description

The BROAN-NUTONE s99100424 is a 3L340 fractional-horsepower V-belt designed for use in HVAC ventilation equipment. This drive belt transmits rotational power from the motor sheave to the blower or fan wheel, maintaining proper airflow through the unit. The 3L340 designation identifies a standard light-duty, raw-edge V-belt profile in the 3L cross-section series, with a nominal outside circumference of 34 inches. HVAC technicians and ventilation service professionals install this belt as a direct OEM-style service replacement when the original belt shows signs of wear, glazing, cracking, or slippage.

This V-belt is suited for use in residential and light-commercial ventilation applications where BROAN-NUTONE blower assemblies are installed. Typical install scenarios include whole-house ventilators, inline fans, and similar belt-driven air-moving equipment that rely on fractional-horsepower motors. Service technicians performing scheduled maintenance or responding to reduced airflow complaints commonly replace this component as part of a blower drive inspection.

Key Features

• 3L340 cross-section profile: standard fractional-horsepower light-duty V-belt designation
• Nominal 34-inch outside circumference suited to small-diameter sheave applications
• OEM service part number for BROAN-NUTONE ventilation equipment
• Replacement belt addresses common failure modes including glazing, cracking, and belt slip

Compatibility

Designed as an OEM-style service replacement V-belt for BROAN-NUTONE belt-driven ventilation equipment requiring a 3L340 drive belt.

Installation Notes

Installation should be performed by a qualified HVAC technician. Disconnect and lock out all electrical power to the unit before removing the blower access panel or handling the drive belt. Inspect both the motor sheave and blower sheave for wear or misalignment before fitting the replacement belt, as sheave damage accelerates belt wear. Do not use belt dressing compounds, and ensure proper belt tension per the equipment manufacturer service documentation before restoring power.

Technical Specifications

• Belt Designation: 3L340
• Belt Type: Fractional Horsepower V-Belt
• Nominal Outside Circumference: 34 inches
• Cross-Section Series: 3L

Standard Information

• Brand: BROAN-NUTONE
• Manufacturer Part Number: s99100424