Lukjan to5408 Duct Board Top Takeoff 8 Inches

Product Description

The LUKJAN to5408 is an 8-inch duct board top takeoff designed to transition air from duct board plenums to branch ducts in forced-air HVAC systems. Constructed from galvanized steel, it provides a durable, corrosion-resistant connection point that holds up in both residential and light commercial installations. The unit measures 13 inches in length, 8 inches in width, and 9.5 inches in height, giving installers a well-proportioned fitting that seats securely against duct board surfaces. Licensed HVAC technicians and sheet metal mechanics rely on this type of takeoff to maintain system airflow balance and minimize air leakage at branch connections.

This takeoff is suited for duct board plenum systems in residential forced-air heating and cooling applications as well as light commercial projects where duct board construction is specified. It is installed at the top of the plenum to direct conditioned air into branch runs. The 8-inch throat size accommodates standard branch duct sizing common in residential load calculations. Its galvanized steel build makes it appropriate for unconditioned spaces such as attics and crawlspaces where moisture resistance matters.

Key Features

• Galvanized steel construction for corrosion resistance in attic, crawlspace, and mechanical room environments
• 8-inch throat size compatible with standard residential branch duct sizing
• Top takeoff configuration for plenum-to-branch transitions in duct board systems
• Compact profile at 13 inches long by 8 inches wide by 9.5 inches tall for tight plenum installations
• Lightweight at 0.5 pounds for easy single-technician handling during installation

Compatibility

Designed as an OEM-style replacement and new-installation fitting for duct board plenum systems requiring an 8-inch top takeoff connection.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal mechanic. Power down the air handling unit and verify the system is de-energized before beginning any ductwork modifications. Secure the takeoff to the duct board plenum using approved duct board adhesive and mechanical fasteners per local mechanical code requirements, and seal all joints with UL 181-rated tape or mastic to prevent air leakage. Do not operate the system until all connections are fully sealed and inspected.