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The RECTORSEAL 803-12 is a galvanized steel duct ring designed to create a secure transition connection between 12-inch round ductwork and ceiling diffusers or grilles. The rigid ring construction holds its shape under normal HVAC operating conditions, supporting proper airflow at the supply or return opening. Licensed HVAC technicians and sheet metal installers use this component during new construction and retrofit installations where a reliable mechanical connection is needed between the duct collar and the face product above.
This duct ring is suited for residential and light commercial HVAC applications. It is typically installed at ceiling level, connecting round flex duct or rigid duct to a diffuser or grille rated for a 12-inch opening. The galvanized steel finish resists corrosion in the moderate-humidity environments common to attic and plenum spaces.
Designed as an OEM-style replacement and new-installation component for 12-inch round duct systems paired with ceiling diffusers or grilles in residential and light commercial HVAC applications.
Installation is typically performed by a licensed HVAC technician or sheet metal installer. Shut down the air handling system and confirm the system is de-energized before working in the plenum or at the ceiling opening. Secure the ring to the duct collar using sheet metal screws or appropriate duct fasteners per local mechanical code requirements. Verify the diffuser or grille face product is rated for a 12-inch neck before fastening.
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