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The SOUTHWARK METAL 231010 is a 10 x 10 inch offset collar in the Series 23 line, designed for use in sheet metal ductwork transitions and register boot installations. Offset collars allow the duct opening to shift position relative to the ceiling or floor surface, providing installation flexibility when a straight collar cannot align with the structural framing or finished surface. This fitting is sold as a single unit and is installed by HVAC technicians and sheet metal contractors during new construction or retrofit duct system work.
The 231010 is suited for residential and light commercial forced-air HVAC systems where a 10 x 10 inch duct opening requires an angled or offset transition to a register, grille, or boot. This configuration is commonly needed when joist spacing or ceiling construction prevents a direct vertical drop from the plenum or trunk line to the finished register opening.
Designed as an OEM-style sheet metal fitting for residential and light commercial forced-air duct systems requiring a 10 x 10 inch offset collar transition.
Installation is performed by licensed HVAC technicians or sheet metal workers following applicable mechanical codes. Power down the air handling unit and confirm the system is de-energized before working inside an air distribution system. Secure the collar to the duct boot or trunk opening using sheet metal screws and seal all joints with UL-listed duct mastic or foil tape per local mechanical code requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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