Lukjan rb104128 Register Boot 4x12x8 in Center End

Product Description

The LUKJAN rb104128 is a sheet metal register boot designed to transition from ductwork to a floor, wall, or ceiling register opening. This boot features a center end inlet configuration and measures 4 inches by 12 inches by 8 inches, making it a standard fit for residential and light commercial forced-air distribution systems. HVAC installers and sheet metal contractors use this type of fitting to connect supply trunk lines or branch runs to the final register or grille at the conditioned space. The metal construction holds its shape under typical duct system pressures and supports a clean, square register opening for proper airflow delivery.

The rb104128 is suited for new construction and retrofit duct installations where a center end boot configuration is required. It fits into standard supply air branch runs in residential forced-air heating and cooling systems. The 4-inch by 12-inch face opening accommodates common register sizes used in floor and sidewall applications, and the 8-inch depth provides adequate throat length for proper airflow transition. HVAC technicians working on single-family homes and light commercial spaces will find this boot appropriate for typical branch-duct-to-register connections.

Key Features

• Center end inlet configuration for flexible branch duct routing
• 4 x 12 x 8 inch dimensions suit standard residential register openings
• Sheet metal construction provides structural rigidity under normal duct pressures
• Compatible with common floor, wall, and sidewall register installations

Compatibility

Designed as an OEM-style replacement and new-installation fitting for standard residential and light commercial forced-air duct systems requiring a center end register boot.

Installation Notes

Installation should be performed by a qualified HVAC technician or licensed sheet metal contractor in accordance with local mechanical codes and SMACNA duct construction standards. Shut down the air handling system before cutting into existing ductwork or securing the boot to a branch run. Seal all seams and connections with UL 181-rated mastic or foil tape to minimize air leakage. Secure the boot to the subfloor or wall framing with appropriate fasteners before attaching the register or grille.

Technical Specifications

• Face Dimensions: 4 x 12 inches
• Boot Depth: 8 inches
• Inlet Configuration: Center End

Standard Information

• Brand: LUKJAN
• Manufacturer Part Number: rb104128