Southwark Metal 28R_4X14X7 Duct End Boot 4x14 to 7in

Product Description

The SOUTHWARK METAL 28R_4X14X7 is a rectangular-to-round sheet metal duct end boot designed for residential and light commercial HVAC duct systems. It transitions a 4 inch by 14 inch rectangular duct opening to a 7 inch round collar, with the round outlet positioned at the center of the boot. Fabricated from hot-dipped galvanized steel, this boot resists corrosion in the crawlspace, attic, and wall-cavity installations common to forced-air systems. HVAC technicians and sheet metal contractors install this fitting when terminating a rectangular duct run at a floor, wall, or ceiling register location.

This end boot suits standard residential forced-air heating and cooling distribution systems where rectangular trunk or branch duct transitions to a round takeoff feeding a floor or wall register. The center-outlet configuration positions the 7 inch round collar at the midpoint of the 4 inch by 14 inch face, which helps balance airflow through the register opening. It is appropriate for new construction and retrofit duct work where the register size and duct geometry match these dimensions. Installation is typically performed by licensed HVAC technicians or sheet metal workers following ACCA and SMACNA duct fabrication and installation standards.

Key Features

• Rectangular-to-round transition: 4 inch by 14 inch face to 7 inch round collar
• Center outlet positioning for balanced airflow distribution
• Hot-dipped galvanized steel construction for corrosion resistance
• Designed for register termination at floor, wall, or ceiling locations
• Fabricated to ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential and light commercial forced-air duct systems requiring a rectangular-to-round end boot with a 4 inch by 14 inch rectangular opening and a 7 inch round outlet.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal worker. Shut down the air handling unit and isolate the system before modifying or connecting duct sections. Secure the boot to the duct and register frame using sheet metal screws and seal all joints with UL 181-rated mastic or foil tape per SMACNA guidelines. Verify that the register or grille selected matches the 4 inch by 14 inch face opening before finalizing the installation.

Technical Specifications

• Material: Hot-Dipped Galvanized Steel
• Rectangular Opening (Size A): 4 inches length x 14 inches width
• Round Collar Diameter (Size B): 7 inches
• Outlet Direction: Center
• Type: Register, Rectangular to Round End Boot
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 28R_4X14X7