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The SOUTHWARK METAL 98WD_14IN is a 14-inch round sheet metal spin-in collar with an integrated scoop damper, designed for use in ductboard air distribution systems. Fabricated from hot dip galvanized steel, this collar provides a secure, airtight transition point where a round branch duct connects to a flat ductboard plenum or trunk. The scoop damper allows field-adjustable airflow balancing at the takeoff point. HVAC installers and sheet metal contractors use this fitting during new construction and retrofit duct installations where ductboard systems require balanced airflow to individual zones or rooms.
This fitting is suited for residential and light commercial HVAC applications where ductboard is the primary trunk or plenum material. The spin-in design allows fast, tool-minimal installation directly into a pre-cut ductboard opening. The integrated scoop captures moving air from the main trunk and redirects it into the branch run, improving airflow efficiency at the takeoff. The adjustable damper allows the installer to fine-tune air volume delivery after the system is commissioned, eliminating the need for a separate balancing damper downstream.
Designed as an OEM-style fitting for ductboard trunk and plenum systems requiring a 14-inch round spin-in takeoff collar with integrated damper control.
Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor. Power down the air handling unit before cutting into any pressurized ductboard section and before inserting the collar. Use a proper ductboard knife and circle cutter to produce a clean, correctly sized opening to ensure a snug spin-in fit and an airtight seal. Follow SMACNA ductboard construction standards and local mechanical code requirements for joint sealing and support spacing.
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