Lukjan sb103148 Stack Boot Center End 3.25x14x8 in Box 24

Product Description

The LUKJAN sb103148 is a center-end stack boot designed for sheet metal duct distribution in residential and light commercial HVAC systems. This fitting transitions airflow from a horizontal trunk duct to a vertical floor or wall stack, serving as a key connection point in forced-air supply systems. The nominal size is 3.25 x 14 x 8 inches, making it suited for standard trunk-and-branch layouts. HVAC installers and sheet metal contractors use this component during new construction and retrofit duct work to deliver conditioned air to individual registers. It ships in a box quantity of 24 units.

The sb103148 stack boot is used in forced-air heating and cooling systems where supply air must be routed from a main trunk duct into a wall or floor stack. This center-end configuration allows the boot to connect at the end of a duct run while centering the stack for proper register alignment. It is a standard component in residential duct installations and is also applicable in light commercial construction where similar duct sizing is used.

Key Features

• Center-end configuration allows end-of-run trunk connections with centered stack alignment
• Nominal dimensions of 3.25 x 14 x 8 inches suit standard trunk-and-branch supply systems
• Sold in a box of 24 units, suitable for multi-unit or high-volume installations
• Sheet metal construction typical of LUKJAN HVAC fittings for durable duct integration

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential and light commercial forced-air supply duct systems using standard trunk-and-branch layouts with 3.25 x 14 x 8 inch stack dimensions.

Installation Notes

Installation of sheet metal stack boots should be performed by a licensed HVAC technician or qualified sheet metal contractor. Power down the air handling system before connecting or modifying any duct section. Secure all joints with appropriate sheet metal screws and seal with UL-listed duct mastic or foil-backed tape per local mechanical code requirements. Do not compress or deform the boot throat during installation, as this will restrict airflow and reduce system performance.

Technical Specifications

• Nominal Size: 3.25 x 14 x 8 inches
• Configuration: Center End
• Box Quantity: 24 units
• Product Type: Stack Boot

Standard Information

• Brand: LUKJAN
• Manufacturer Part Number: sb103148