Lennox 75Y13 – Lennox 240006938 Motorized Vent Damper, 6 Inch, For GSB8 & GSB84 Gas Fired Boilers

 

Product Overview

The Lennox 75Y13 motorized vent damper, part number 240006938, is a genuine Lennox replacement component designed to improve efficiency and safety in gas fired boiler systems. This 6-inch motorized vent damper automatically opens during burner operation and closes when the boiler is off, helping to reduce standby heat loss through the flue. It is specifically engineered for compatibility with Lennox GSB8 and GSB84 series gas fired boilers with 4-section and 5-section configurations.

Built to Lennox factory specifications, this vent damper ensures proper draft control, reliable operation, and compliance with OEM performance standards. Using a genuine Lennox motorized vent damper helps maintain system efficiency, protects internal boiler components, and supports safe exhaust venting.

 

Specifications

Manufacturer: Lennox
Lennox Part Number: 75Y13
Alternate Part Number: 240006938
Product Type: Motorized Vent Damper
Damper Size: 6 Inch
Operation: Automatic / Motorized
Application: Boiler venting system
Compatibility: Lennox GSB8 and GSB84 gas fired boilers
Boiler Sections: 4 section and 5 section models
Fuel Type: Natural gas / LP (per boiler configuration)
Mounting Location: Flue / vent pipe

 

Key Features

Automatically opens and closes to control flue gases
Reduces standby heat loss and improves boiler efficiency
Designed for proper draft and safe exhaust venting
OEM Lennox replacement part for exact fit and performance
Durable construction for long service life in boiler applications

 

Applications

This motorized vent damper is used in Lennox GSB8 and GSB84 series gas fired boilers installed in residential and light commercial hydronic heating systems. It is ideal for repairs, maintenance, or replacement of worn or non-functioning vent dampers.

 

Installation Notes

Installation should be performed by a qualified HVAC or boiler technician in accordance with manufacturer guidelines and local codes. Proper sizing, wiring, and vent alignment are critical for safe operation.