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The SOUTHWARK METAL 91_6X10 is a sheet metal duct box designed for floor register installations in residential and light commercial HVAC duct systems. Fabricated from hot-dip galvanized steel, this duct box measures 6 inches by 10 inches with an 11-inch depth, providing a durable and corrosion-resistant enclosure that connects ductwork to a floor-mounted supply register. It is installed by licensed HVAC technicians and sheet metal contractors who require a code-compliant, rigid boot that holds its shape under normal system pressures and foot traffic loads above.
This duct box is suited for forced-air heating and cooling systems where floor registers are the preferred supply outlet. The 6-inch by 10-inch opening aligns with standard floor register sizing, making it a common choice in new construction and replacement work. Its 11-inch depth accommodates typical subfloor and framing clearances found in residential installations. HVAC contractors and sheet metal workers specify this box where ACCA and SMACNA standards govern duct fabrication and installation quality.
Designed as an OEM-style replacement and new-construction floor register duct box for forced-air HVAC systems requiring a 6-inch by 10-inch floor boot.
Installation should be performed by a qualified HVAC technician or sheet metal contractor. Power down the air handling unit and close the system before cutting into existing ductwork or framing. Seal all joints with mastic or UL-listed foil tape per SMACNA guidelines to minimize air leakage. Secure the box to framing members according to local mechanical code requirements before setting the floor register.
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