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The SOUTHWARK METAL 28R_2-1/4X10X6 is a center-end sheet metal pipe boot designed to transition from round duct to a rectangular register opening. Fabricated from hot dip galvanized steel, it connects a 6-inch diameter round pipe to a 2-1/4 x 10 inch rectangular register face. This fitting is used in low-velocity supply air duct systems where floor, wall, or ceiling registers require a clean transition from flexible or rigid round duct. Licensed HVAC installers and sheet metal mechanics are the primary users of this fitting in both new construction and retrofit applications.
This boot end is suited for residential and light commercial forced-air HVAC installations. The center-end configuration positions the round collar at the center of the rectangular boot, which accommodates straight duct runs feeding directly into a register opening. The 2-1/4 x 10 inch rectangular opening matches a standard register size common in residential floor and wall applications. The fitting conforms to ACCA and SMACNA standards, making it appropriate for systems designed and installed to those specifications.
Designed as an OEM-style sheet metal fitting for forced-air HVAC duct systems using 6-inch round supply duct and standard 2-1/4 x 10 inch rectangular register openings.
This fitting is installed by licensed HVAC technicians or sheet metal mechanics as part of a supply air duct system. Shut down the air handler or furnace and confirm the system is de-energized before working on duct connections. Secure the round collar to the supply duct using sheet metal screws and foil-backed mastic or UL-listed duct tape per SMACNA installation guidelines. Ensure the rectangular boot face is properly sealed to the subfloor or wall framing to prevent air leakage at the register opening.
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