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The SEAL-TITE 1279-24-041207 is a 7-inch elbow register boot designed for basement and ceiling HVAC duct terminations. It accepts a 4-inch x 12-inch register face and includes 4-inch rails to secure the register grille in place. This boot transitions from round or rectangular duct to a flat register opening at a 7-inch offset, making it the correct choice for installations where the duct approaches the floor or ceiling at an angle. HVAC technicians and installers use this type of boot when rough-in conditions require an offset termination rather than a straight drop or side-wall exit.
This elbow register boot is suited for residential forced-air systems in basement ceilings, first-floor subfloor applications, and similar installations where duct runs are routed horizontally and must terminate downward or upward through a finished surface. The 4-inch rails support standard 4-inch x 12-inch floor or ceiling registers, keeping the grille flush and secure against the finished surface. It is intended for new construction and retrofit duct work where a low-profile offset boot is needed to meet layout constraints.
Designed as an OEM-style replacement and new-construction boot compatible with standard 4-inch x 12-inch residential HVAC floor and ceiling registers in forced-air duct systems requiring a 7-inch elbow offset termination.
Installation is performed by licensed HVAC technicians or sheet metal contractors. Shut down the air handler and close the system before connecting or repositioning any duct boot. Secure the boot to the duct with sheet metal screws and seal all joints with listed duct mastic or UL 181-rated tape per local mechanical code requirements. Confirm the register grille seats flush against the finished ceiling or floor surface before fastening.
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