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The AIR FLOW PRODUCTS 7340805 is a 90-degree register boot designed to transition ductwork to a wall, floor, or ceiling register opening. This fitting connects round or rectangular duct runs to a standard register face and redirects airflow at a right angle to deliver conditioned air into the living space. The boot measures 4 inches by 8 inches by 5 inches and suits residential forced-air HVAC systems. Licensed HVAC technicians and sheet metal installers typically handle this fitting as part of a new installation or duct retrofit.
This register boot is suited for residential and light commercial forced-air distribution systems where a 90-degree directional change is needed at the terminal end of a duct run. Common applications include floor register drops, sidewall takeoffs, and ceiling diffuser connections in new construction and renovation projects. The 4x8x5 inch sizing corresponds to a standard register opening, making it compatible with common register and grille sizes found in residential builds.
Designed as an OEM-style replacement or new-installation fitting for standard residential forced-air duct systems requiring a 90-degree register boot with a 4x8x5 inch profile.
Installation should be performed by a qualified HVAC technician or licensed sheet metal contractor in accordance with local mechanical codes and SMACNA duct construction standards. Power down the air handler and shut off the system before cutting into or modifying any duct section. Secure the boot to the duct with sheet metal screws and seal all joints with UL-listed foil tape or mastic sealant to prevent air leakage. Verify register face dimensions match the boot opening before fastening the grille or register to the boot collar.
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