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The SEAL-TITE 3172B-061206 is a straight sheet metal boot designed for residential and light commercial HVAC duct systems. This fitting transitions ductwork to a floor, wall, or ceiling register opening and is fabricated from 30-gauge steel for consistent shape retention and reliable installation. The boot measures 6 inches by 12 inches at the register face and connects to a 6-inch round duct collar. HVAC installers and sheet metal contractors use this style of boot as a standard component in forced-air supply and return distribution systems.
This straight boot is suited for new construction and replacement applications where a 6-inch round duct feeds a 6-inch by 12-inch rectangular register opening. The straight configuration directs airflow directly through the boot without an offset, making it appropriate for installations where the duct drops or rises vertically in line with the register. It is commonly installed in residential forced-air systems as part of a supply trunk-and-branch layout or a fully ducted return system.
Designed as an OEM-style replacement or new-construction component for residential and light commercial forced-air duct systems requiring a 6-inch round to 6-inch by 12-inch rectangular transition boot.
Installation is performed by licensed HVAC technicians or qualified sheet metal contractors. Shut down and lock out the air handler or furnace before connecting or replacing any duct boot. Seal all joints with UL 181-rated mastic or foil tape in accordance with local mechanical codes and ACCA Manual D requirements. Secure the boot to the subfloor or framing with appropriate sheet metal screws before setting the register grille.
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