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The SOUTHWARK METAL ATSD_10IN is a 10-inch diameter Air-Tite sheet metal duct takeoff designed for forced-air HVAC distribution systems. Constructed from hot-dip galvanized steel, this takeoff fitting includes an integrated scoop and damper, allowing airflow to be directed off a main trunk duct and regulated at the branch connection point. It is a common component in residential and light commercial duct systems and is typically installed by licensed HVAC technicians or sheet metal contractors during new construction or duct retrofit work. The galvanized steel construction resists corrosion in attic, crawlspace, and mechanical room environments where moisture and temperature swings are common.
This fitting is suited for trunk-and-branch duct system layouts where individual branch runs require both a smooth air entry scoop and volume control damper at the takeoff point. The Air-Tite designation indicates a tighter-fitting construction intended to reduce air leakage at the branch connection. It is appropriate for residential supply duct systems and light commercial applications where ACCA and SMACNA duct standards apply. HVAC installers use this type of fitting when branch airflow balancing is required without adding a separate inline balancing damper downstream.
Designed as an OEM-style sheet metal duct fitting for residential and light commercial forced-air systems requiring a 10-inch diameter branch takeoff connection from a rectangular or round trunk duct.
Installation should be performed by a qualified HVAC technician or sheet metal contractor in accordance with SMACNA duct construction standards and local mechanical codes. Shut down and de-energize the air handling system before cutting into an existing trunk duct or securing the takeoff fitting. Secure the fitting to the trunk duct using sheet metal screws and seal all joints with UL-listed duct sealant or mastic to minimize air leakage per ACCA Manual D guidelines. Set the integral damper position during system commissioning and airflow balancing, not during rough-in installation.
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