The Lennox X4251 rectangular zone damper is a dependable side-mount design engineered for precise airflow control in multi-zone HVAC systems. Featuring a 24 inch x 14 inch galvanized steel frame, this damper supports efficient zoning performance by opening or closing airflow to designated areas based on thermostat demand. The 6759L assembly provides smooth, reliable blade operation and long-term durability, making it a trusted replacement part for residential and light commercial Lennox zoning equipment.

Designed for easy installation in existing duct runs, the X4251 helps improve comfort balance and enhances overall system efficiency while reducing energy use. It is commonly used in new zoning projects as well as service replacements where exact-fit Lennox components are required.

 

Key Features:

• Genuine Lennox rectangular zone damper
• Side-mount configuration for flexible duct installation
• 24 inch x 14 inch frame size
• Durable galvanized steel construction
• Ensures accurate airflow regulation between zones
• Compatible with Lennox zoning systems using damper model 6759L
• Supports improved comfort distribution and system efficiency

 

Specifications:

• Part Number: X4251
• Damper Model: 6759L
• Type: Rectangular zone damper
• Mounting Style: Side mount
• Dimensions: 24 in x 14 in
• Material: Galvanized steel
• Application: Residential and light commercial HVAC zoning systems