Southwark Metal 13_12X8 Trunk Duct Angle 12x8 in 45 Degree

Product Description

The SOUTHWARK METAL 13_12X8 is a sheet metal trunk duct angle fitting designed for directional transitions in forced-air HVAC duct systems. Fabricated from hot dip galvanized steel, this fitting delivers a 45-degree angle change in a flat, Broadway-style configuration with a radius throat for smooth airflow. Sized at 12 inches x 8 inches on both the inlet and outlet, it maintains a consistent duct cross-section through the turn. It is installed by licensed HVAC technicians and sheet metal contractors working on residential and light commercial supply or return trunk duct assemblies. Compliance with ACCA and SMACNA standards is built into the design.

This duct angle is used in trunk-and-branch duct systems where a 45-degree horizontal or vertical direction change is required while keeping the same rectangular duct size throughout the transition. The flat, Broadway profile with a radius throat minimizes turbulence and pressure drop at the bend. Typical applications include main supply trunk runs in attic, crawlspace, basement, or mechanical room installations where space constraints require a gradual directional change rather than a sharp elbow.

Key Features

• 45-degree angle provides gradual directional change for lower pressure drop versus sharper fittings
• Flat Broadway configuration with radius throat promotes smooth, low-turbulence airflow through the turn
• Hot dip galvanized steel construction resists corrosion in typical HVAC environments
• Consistent 12 x 8 inch sizing on both inlet and outlet eliminates any cross-section reduction through the fitting
• Designed to ACCA and SMACNA standards for code-compliant duct system fabrication

Compatibility

Designed as an OEM-style replacement and new-construction fitting for rectangular sheet metal trunk duct systems using 12 inch x 8 inch duct sections requiring a 45-degree angle change.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal contractors working under applicable mechanical codes, including SMACNA duct construction standards. Shut down the air handler or furnace and confirm the system is de-energized before modifying or connecting ductwork. Seal all joints with approved duct sealant or mastic and secure with sheet metal screws per SMACNA guidelines. Do not substitute foil tape alone as the primary joint seal on pressure-class duct systems.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size A: 12 inches x 8 inches
• Size B: 12 inches x 8 inches
• Angle: 45 degrees
• Type: Flat, Broadway, Radius Throat
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 13_12X8