Lennox Zone Damper X4255 – Rectangular Bottom Mount, 8" x 16" (6815L)

 

The Lennox Zone Damper X4255 is a high-quality rectangular HVAC zone control damper engineered for durable performance and precise airflow management. Designed for use in Lennox zoning systems and compatible with a wide range of heating, ventilation and air conditioning ductwork, this 8 inch x 16 inch bottom mount damper (6815L) enables balanced, efficient air distribution throughout residential and commercial spaces. The rugged construction delivers reliable operation, improved system efficiency, and enhanced indoor comfort by directing conditioned air only where it’s needed.

This Lennox zone damper features a bottom mount configuration that simplifies installation in rectangular duct runs and integrates seamlessly with zoned HVAC controls. The 8" x 16" size ensures optimal airflow capacity, reducing energy waste and helping maintain consistent temperatures across multiple zones. Built to Lennox’s exacting standards, the X4255 damper offers long-lasting performance, quiet operation, and dependable zone control for year-round comfort.

Ideal for replacing worn or damaged dampers or upgrading existing zoning systems, the Lennox X4255 damper supports improved system efficiency, better temperature control, and greater comfort in multi-zone applications. Whether you’re servicing a Lennox system or enhancing airflow in zoned HVAC installations, this damper delivers the quality and reliability professionals trust.

 

Specifications – Lennox X4255 Zone Damper (6815L)

 

Manufacturer
Lennox

Lennox Part Number
X4255

Catalog / Model Number
6815L

Product Type
HVAC Zone Damper

Damper Shape
Rectangular

Mounting Type
Bottom Mount

Duct Opening Size
8 inch x 16 inch