Southwark Metal 1146R2010 Flat 90 Radius Elbow 20x10

Product Description

The SOUTHWARK METAL 1146R2010 is a flat 90-degree radius elbow designed for rectangular sheet metal ductwork. This fitting makes a smooth 90-degree directional change in a low-profile, flat orientation, helping route supply or return air through tight ceiling, wall, or floor cavities where a standard throat elbow will not fit. The radius design reduces turbulence at the turn compared to a sharp-throat fitting, supporting better airflow efficiency through the duct system. Sheet metal contractors and HVAC installers use this fitting in new construction and retrofit duct systems.

This elbow is sized for 20x10 inch rectangular duct and is suited for residential and light commercial forced-air HVAC systems. The flat geometry makes it particularly useful in low-clearance applications such as under-floor installations, dropped ceiling spaces, and horizontal trunk-line routing where vertical depth is limited. It connects inline with standard rectangular sheet metal duct sections of matching cross-section.

Key Features

• Flat 90-degree radius turn for low-clearance duct routing
• Radius construction reduces airflow resistance at the elbow compared to square-throat designs
• Sized for 20x10 inch rectangular ductwork
• Sheet metal construction suitable for standard forced-air duct systems
• Compatible with standard rectangular duct slip or drive connections

Compatibility

Designed as an OEM-style sheet metal duct fitting for use with standard 20x10 inch rectangular duct sections in residential and light commercial forced-air HVAC duct systems.

Installation Notes

Installation should be performed by a licensed sheet metal contractor or HVAC technician in accordance with SMACNA duct construction standards and applicable local mechanical codes. Disconnect and lock out the air handling unit before working on the duct system. Secure the fitting to adjoining duct sections using drive cleats, S-cleats, or equivalent fasteners, and seal all joints with UL 181-rated mastic or foil tape to maintain system integrity.

Technical Specifications

• Fitting Type: Flat 90-Degree Radius Elbow
• Duct Size: 20x10 inches
• Material: Sheet Metal

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 1146R2010