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The AIR FLOW PRODUCTS 7731006 is a straight register boot designed to connect rectangular duct openings to floor, wall, or ceiling registers in residential and light commercial HVAC systems. This boot features a 3.25 x 10 inch rectangular face opening and a 6 inch round collar for duct connection. The straight configuration allows for a direct, low-restriction airflow path from the duct to the register face. HVAC installers and sheet metal contractors use this component during new construction and renovation work to terminate supply or return duct runs at the register location.
This register boot is suited for residential forced-air systems where a 3.25 x 10 inch register opening is required. The 6 inch round collar mates to standard 6 inch round duct or flex duct, making it a common choice in floor and sidewall register installations. The 77M designation identifies the series within the AIR FLOW PRODUCTS line, and the straight geometry keeps the transition simple and space-efficient where the duct runs directly beneath or behind the register face.
Designed as a standard replacement or new-construction register boot compatible with 3.25 x 10 inch registers and 6 inch round duct connections in residential and light commercial forced-air HVAC systems.
Installation is typically performed by a licensed HVAC technician or sheet metal contractor. The system should be shut down and power to the air handler or furnace should be disconnected before working on duct terminations. The 6 inch collar should be connected to the supply or return duct using appropriate sheet metal screws and duct tape or mastic sealant per local mechanical code requirements. Verify the register grille dimensions match the 3.25 x 10 inch face opening before finalizing the installation.
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