Southwark Metal 1146R128 Flat 90 Radius Elbow 14x12x8

Product Description

The SOUTHWARK METAL 1146R128 is a flat 90-degree radius elbow duct fitting designed for rectangular sheet metal ductwork systems. This fitting provides a smooth, radius-style directional change rather than a sharp square-throat turn, reducing static pressure loss and turbulence at the elbow. It measures 14 x 12 x 8 inches and is fabricated from sheet metal to standard HVAC duct construction practices. HVAC sheet metal mechanics and duct fabricators install this fitting during new construction and retrofit projects requiring a 90-degree directional change in low-pressure supply or return air distribution systems.

This radius elbow is suited for residential and light commercial HVAC duct systems where maintaining airflow efficiency through directional transitions is a priority. The flat profile accommodates installations in confined ceiling plenums, crawlspaces, or between-joist runs where a standard round or high-profile elbow would not fit. It connects inline with rectangular ductwork at the specified 14 x 12 x 8 inch dimensions and is fabricated for field assembly or pre-fabricated system integration.

Key Features

• Radius-style 90-degree turn reduces turbulence and static pressure drop compared to square-throat elbows
• Flat elbow profile fits low-clearance installation spaces such as ceiling plenums and crawlspaces
• Sheet metal construction compatible with standard rectangular duct assembly methods
• 14 x 12 x 8 inch dimensions for direct integration into matching rectangular duct runs

Compatibility

Designed as an OEM-style sheet metal duct fitting for rectangular low-pressure HVAC supply and return air distribution systems requiring a 90-degree directional change.

Installation Notes

Installation is performed by licensed sheet metal mechanics or HVAC technicians following SMACNA duct construction standards. Shut down the air handling unit and de-energize associated equipment before beginning ductwork modifications. Secure the fitting to adjoining duct sections using standard drive cleats, S-cleats, or mechanical fasteners, and seal all joints with UL 181-rated mastic or approved foil tape per local mechanical code requirements.

Technical Specifications

• Fitting Type: Flat 90-Degree Radius Elbow
• Dimensions: 14 x 12 x 8 inches
• Material: Sheet Metal
• Duct Shape: Rectangular

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 1146R128