Southwark Metal 27_3-1/4X10X8 Duct Boot 3.25x10 to 8 in

Product Description

The SOUTHWARK METAL 27_3-1/4X10X8 is a straight stack duct boot that transitions from a rectangular duct opening to a round collar for residential and light commercial forced-air distribution systems. Fabricated from hot dipped galvanized steel, this fitting provides a durable, corrosion-resistant connection between floor or wall stack cavities and round branch ducts. The rectangular inlet measures 3.25 inches by 10 inches, and the round outlet is 8 inches in diameter. HVAC installers and sheet metal contractors use this type of boot to complete supply or return air rough-ins where a wall stack feeds into round flex or rigid duct takeoffs.

This straight stack boot is suited for residential new construction and retrofit installations where a floor or wall stack cavity serves as the supply plenum transition point. It fits standard framing cavities and connects to 8-inch round duct runs. The straight configuration keeps the airflow path direct, making it appropriate for installations where the boot registers at the floor or low sidewall and the duct run continues in line with the stack. Installers working to ACCA Manual D layouts and SMACNA duct construction standards will find this fitting meets those applicable guidelines.

Key Features

• Rectangular-to-round transition: 3.25 inch by 10 inch inlet to 8 inch diameter outlet
• Hot dipped galvanized steel construction resists corrosion in unconditioned spaces
• Straight stack orientation keeps airflow path direct and minimizes pressure drop
• Meets ACCA and SMACNA applicable standards for sheet metal duct construction
• Compatible with standard 8-inch round rigid or flexible duct connections

Compatibility

Designed as an OEM-style replacement and new-construction fitting for residential and light commercial forced-air duct systems using wall or floor stack installations with 8-inch round branch duct connections.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal contractors. Shut off the air handling unit and confirm the system is de-energized before working inside an active duct system. Secure all duct connections with sheet metal screws and seal joints with UL 181-listed mastic or foil tape per local mechanical code requirements. Consult SMACNA duct construction standards and local building codes for support spacing and fastener requirements.

Technical Specifications

• Material: Hot Dipped Galvanized Steel
• Inlet Size (Size A): 3.25 inches x 10 inches (rectangular)
• Outlet Size (Size B): 8 inches diameter (round)
• Type: Stack, Straight, Rectangular to Round
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 27_3-1/4X10X8