The Lennox X4240 rectangular zone damper is designed for precise airflow control in residential and light commercial HVAC zoning systems. Built for reliability and smooth operation, this side-mount damper helps regulate air distribution between zones, improving comfort and system efficiency. The 14 x 12 inch rectangular configuration makes it ideal for standard duct applications, while the durable construction ensures long service life in demanding HVAC environments.

This zone damper is commonly used in zoned forced-air systems where accurate control of airflow is required to balance temperatures across multiple areas. As a genuine Lennox component, it is engineered to meet OEM performance and compatibility standards.

 

Key features and benefits:

• Rectangular zone damper for HVAC zoning systems
• Side-mount design for flexible installation
• 14 inch x 12 inch duct opening
• Helps improve temperature balance and overall comfort
• Supports efficient airflow management and system performance
• OEM Lennox quality for dependable operation

 

Applications:

• Residential HVAC zoning systems
• Light commercial ducted HVAC applications
• Replacement or new zoning installations

 

Specifications:

• Brand: Lennox
• Model / Part Number: X4240
• Additional Reference: 6744L
• Damper type: Rectangular zone damper
• Mounting style: Side mount
• Duct size: 14 inch x 12 inch
• Application: Airflow control in zoned HVAC systems