The Lennox X4220 (6725L) rectangular zone damper is designed for precise airflow control in zoned HVAC systems. Featuring a side-mount configuration, this damper allows reliable regulation of air distribution to individual zones, helping improve comfort, system efficiency, and temperature balance throughout residential or light commercial applications. Built to Lennox OEM standards, it integrates seamlessly with compatible Lennox zoning controls and duct systems.

This 16 inch by 8 inch rectangular zone damper is commonly used in forced-air heating and cooling systems where consistent airflow management is critical. Its durable construction ensures dependable operation over extended service life, making it a trusted replacement or new installation component for zoning applications.

 

Key Features and Benefits:

• OEM Lennox rectangular zone damper for zoning systems
• Side mount design for flexible installation in ductwork
• Helps improve comfort by balancing airflow between zones
• Supports efficient system operation and reduced energy waste
• Designed for long-term durability and reliable damper actuation

 

Technical Specifications:

Manufacturer: Lennox
Lennox Part Number: X4220
Alternate Part Number: 6725L
Damper Type: Rectangular zone damper
Mounting Style: Side mount
Nominal Size: 16 inch x 8 inch
Application: Zoned forced-air HVAC systems

 

Typical Applications:

• Residential zoned heating and cooling systems
• Light commercial HVAC zoning installations
• Replacement of existing Lennox rectangular zone dampers
• New zoning system installations requiring side-mounted dampers