Southwark Metal 91_12X14 Sheet Metal Duct Box 12x14

Product Description

The SOUTHWARK METAL 91_12X14 is a sheet metal duct box designed for floor register applications in residential and light commercial HVAC systems. Constructed from hot dip galvanized steel, this duct box measures 12 inches by 14 inches with an 11-inch depth. It serves as the transition enclosure between the subfloor framing and the floor register grille, directing conditioned air from the supply duct into the occupied space. HVAC installers and sheet metal contractors rely on this type of fitting to maintain proper airflow geometry and ensure a clean, secure register seat at floor level.

This duct box is suited for new construction and replacement installations where a floor-mounted supply register is specified. The 12-inch by 14-inch opening accommodates standard floor register grilles of the same nominal size. The 11-inch depth provides clearance for typical joist bay installations. It is appropriate for forced-air heating and cooling systems served by low-pressure supply ductwork, and it meets ACCA and SMACNA applicable standards for sheet metal fabrication and installation practice.

Key Features

• Hot dip galvanized steel construction resists corrosion in subfloor environments
• 12 inches by 14 inches nominal opening matches standard floor register grilles
• 11-inch depth fits typical floor joist bay installations
• Floor register type for supply air delivery at floor level
• Fabricated to ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement and new-construction fitting for floor register duct installations using 12-inch by 14-inch nominal register grilles in residential and light commercial forced-air systems.

Installation Notes

Installation is typically performed by licensed sheet metal contractors or HVAC technicians in accordance with SMACNA duct construction standards. Shut down the air handler and isolate the supply duct before cutting into existing ductwork or framing. Secure the box to the framing with appropriate sheet metal screws and seal all joints with mastic or UL-listed foil tape to prevent air leakage. Verify that the register grille frame matches the 12-inch by 14-inch nominal opening before finalizing the installation.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Opening Size: 12 inches x 14 inches
• Depth: 11 inches
• Type: Floor Register Duct Box
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 91_12X14