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The SOUTHWARK METAL 91_10X14 is a sheet metal duct box designed for floor register applications in residential and light commercial forced-air HVAC systems. Constructed from hot-dip galvanized steel, this duct box measures 10 inches by 14 inches with an 11-inch depth. The galvanized finish provides corrosion resistance in below-floor or slab-adjacent installations where moisture exposure is a concern. This type of component serves as the transition between the duct run and the floor register grille, directing conditioned air up through the floor surface. It is typically installed by HVAC technicians or sheet metal contractors during new construction or system retrofit work.
This duct box is suited for floor register installations in residential construction and light commercial applications where a 10-inch by 14-inch register opening is specified. The 11-inch depth accommodates typical sub-floor framing cavities and allows for clean duct termination at the register boot. It is appropriate for use in standard forced-air supply systems where floor-mounted distribution is the design choice. Installers working to ACCA and SMACNA standards will find this component consistent with those guidelines.
Designed as an OEM-style sheet metal floor register duct box for forced-air supply systems requiring a 10-inch by 14-inch floor register opening.
Installation should be performed by a licensed HVAC technician or sheet metal contractor. Shut down the air handling system and disconnect power before connecting or securing the duct box. Secure the boot to the duct run with sheet metal screws and seal all joints with UL-listed foil tape or mastic per SMACNA guidelines. Ensure the register opening is flush with the finished floor surface before fastening the grille.
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