The Lennox X4243 Zone Damper is a reliable rectangular damper designed for precise airflow regulation in residential and light commercial HVAC zoning systems. With its 20 x 12 inch size and durable side-mount configuration, this damper helps improve comfort, efficiency, and balanced air distribution throughout multi-zone setups.

 

Key Features:

• Rectangular zone damper for forced-air HVAC zoning systems
• 20 inch x 12 inch nominal size for standard duct applications
• Side-mount design for easy installation and secure fit
• Helps balance airflow between zones for improved comfort
• Durable construction for long-term performance
• Compatible with Lennox zoning controls and multi-zone systems

 

Specifications:

• Type: Rectangular zone damper
• Mounting Style: Side mount
• Nominal Size: 20 inch x 12 inch
• Frame Construction: Galvanized steel housing
• Blade Type: Parallel blade design
• Blade Material: Aluminum
• Operation: Motorized damper (compatible with Lennox zoning motors)
• Application: Residential and light commercial forced-air zoning
• Orientation: Horizontal or vertical duct installation
• Control Compatibility: Lennox zoning control panels and dampers in the 6700-series family
• Model/Code: 6747L
• Typical Use: Airflow balancing between HVAC zones
• Temperature Range: Suitable for standard heating and cooling airflow
• Connection Type: Rectangular duct flanges