Southwark Metal 14_28X8 Trunk Duct Elbow 28x8 90 Degree

Product Description

The SOUTHWARK METAL 14_28X8 is a 90-degree flat Broadway trunk duct elbow fabricated from hot dip galvanized steel. It is designed for rectangular sheet metal duct systems used in forced-air HVAC distribution. The elbow transitions airflow through a 90-degree turn while maintaining a consistent 28 x 8 inch cross-section at both the inlet and outlet. The radius throat design reduces turbulence and pressure drop at the turn. This fitting is manufactured to ACCA and SMACNA standards, making it appropriate for commercial and residential trunk-and-branch duct layouts installed by licensed HVAC technicians and sheet metal workers.

This elbow is suited for low-pressure forced-air supply or return trunk duct runs where a 90-degree directional change is required without a change in duct size. The flat Broadway profile fits in tight ceiling, floor, or wall cavities where round or square-throat fittings would not clear structural members. Its uniform 28 x 8 inch size on both ends simplifies connection to straight trunk sections of the same dimension. Typical applications include residential and light commercial HVAC systems where sheet metal trunk duct is the primary distribution method.

Key Features

• 90-degree angle provides a full right-angle directional change in the duct run
• Flat Broadway profile accommodates shallow plenum and joist-bay installations
• Radius throat reduces turbulence and static pressure loss at the elbow
• Hot dip galvanized steel construction resists corrosion in humid or unconditioned spaces
• Consistent 28 x 8 inch opening on both ends simplifies connection to matching trunk sections
• Manufactured to ACCA and SMACNA standards for proper fit in code-compliant duct systems

Compatibility

Designed as an OEM-style sheet metal fitting for use with 28 x 8 inch rectangular trunk duct systems built to ACCA and SMACNA specifications.

Installation Notes

Installation should be performed by a licensed HVAC technician or certified sheet metal worker in accordance with SMACNA duct construction standards and applicable local mechanical codes. Shut down the air handling unit and disconnect power before cutting into or modifying an existing duct system. Secure the elbow to adjoining duct sections with sheet metal screws and seal all joints with code-approved mastic or metal-backed tape to prevent air leakage. Avoid over-crimping the connection sleeve, as deformation of the opening can disrupt airflow and affect system performance.

Technical Specifications

• Angle: 90 degrees
• Size A: 28 x 8 inches
• Size B: 28 x 8 inches
• Type: Flat, Broadway, Radius Throat
• Material: Hot Dip Galvanized Steel
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 14_28X8