Southwark Metal 15_8X8 Trunk Duct Angle 8x8 45 Degree

Product Description

The SOUTHWARK METAL 15_8X8 is a 45-degree sheet metal trunk duct angle fitting used in forced-air HVAC duct systems. It transitions an 8-inch x 8-inch duct run through a shortway, vertical turn with a radius throat design that reduces turbulence and pressure drop at the elbow. Fabricated from hot dip galvanized steel, this fitting resists corrosion in both conditioned and unconditioned spaces. HVAC sheet metal mechanics install this fitting during trunk duct construction or retrofit work where a 45-degree directional change is required without increasing duct cross-section. The 8 x 8 inlet and outlet sizes match, making it a straight-through elbow with no transition.

This fitting is suited for residential and light commercial forced-air duct systems where the main trunk requires a 45-degree shortway turn. The shortway orientation keeps the fitting compact along the duct centerline, which helps in tight plenum or joist-bay installations. The radius throat reduces turbulence compared to a square-throat fitting, supporting better airflow efficiency. It meets ACCA and SMACNA standards, making it appropriate for duct systems designed to Manual D or SMACNA low-pressure duct construction specifications. HVAC contractors and sheet metal fabricators use this fitting in new construction and replacement duct work.

Key Features

• 45-degree shortway elbow keeps installed length compact in confined spaces
• Radius throat design reduces pressure drop and turbulence at the turn
• Hot dip galvanized steel construction provides corrosion resistance
• Matched 8-inch x 8-inch inlet and outlet — no cross-section change through the fitting
• Meets ACCA and SMACNA applicable standards for low-pressure duct construction
• Vertical orientation for trunk duct shortway directional changes

Compatibility

Designed as an OEM-style sheet metal fitting for 8-inch x 8-inch rectangular trunk duct systems built to ACCA Manual D and SMACNA low-pressure duct construction standards.

Installation Notes

Installation is performed by licensed HVAC mechanics or qualified sheet metal workers following SMACNA duct construction standards and applicable local mechanical codes. Power down the air handling system before connecting or sealing any duct fitting. Secure the fitting to adjoining duct sections using sheet metal screws and seal all joints with UL 181-rated mastic or foil tape to meet code requirements for duct airtightness. Do not over-compress or distort the fitting during installation, as deformation of the throat radius will increase pressure drop.

Technical Specifications

• Item Type: Sheet Metal Trunk Duct Angle
• Angle: 45 degrees
• Type: Shortway, Vertical, Radius Throat
• Size A (Inlet): 8 inches x 8 inches
• Size B (Outlet): 8 inches x 8 inches
• Material: Hot Dip Galvanized Steel
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 15_8X8