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The SOUTHWARK METAL 44-1_5IN is a 1-Quad sheet metal duct damper sized for 5-inch round duct. It is designed to regulate airflow within low-pressure forced-air distribution systems by restricting or balancing flow in a single duct branch. The blade is fabricated from hot dip galvanized steel, providing corrosion resistance in both supply and return applications. This damper meets ACCA and SMACNA standards, making it appropriate for code-compliant residential and light commercial HVAC installations. HVAC sheet metal mechanics and duct fabricators are the primary trades that install and commission this component.
This damper is suited for installation in rectangular or round sheet metal duct systems where manual airflow balancing is required at a branch takeoff or inline in a 5-inch duct run. Common applications include residential forced-air systems, zoned HVAC distribution, and light commercial ductwork where individual zone or room airflow needs to be trimmed. The 1-Quad configuration is a standard industry format used in fabricated sheet metal duct assemblies built to SMACNA guidelines.
Designed as an OEM-style replacement or new-installation component for standard 5-inch sheet metal duct systems built to SMACNA specifications in residential and light commercial forced-air HVAC applications.
Installation should be performed by a qualified HVAC sheet metal mechanic familiar with SMACNA duct construction standards. Shut down the air handling unit and de-energize all associated electrical components before cutting into existing ductwork. Secure the damper using sheet metal screws per SMACNA assembly guidelines, and verify the blade operates freely through its full range before sealing connections. Duct sealing at joints should comply with local mechanical code requirements.
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