Air Flow Products 84DBD07 Duct Board Tab Takeoff 7 in

Product Description

The AIR FLOW PRODUCTS 84DBD07 is a duct board tab takeoff fitting with an integrated damper, designed for use in low-pressure residential and light commercial duct systems built from duct board (fibrous glass duct board) panels. The tab-style collar allows the fitting to seat securely into a cut opening in the duct board surface, creating a branch takeoff point for round supply runs. The built-in damper lets the installer balance airflow at the branch without adding a separate balancing component. HVAC technicians and sheet metal installers use this fitting when fabricating or repairing duct board trunk-and-branch systems.

This fitting is sized at 7 inches in diameter, making it suitable for standard 7-inch round flexible duct or rigid round branch connections off a duct board trunk. It is typically installed in residential forced-air heating and cooling systems where duct board is the primary trunk material. The tab takeoff design eliminates the need for additional mechanical fasteners at the board interface, streamlining branch connections during new construction or renovation work.

Key Features

• Integrated damper allows airflow balancing at the branch point without a separate component
• Tab collar design seats directly into duct board for a secure, tool-minimal connection
• 7-inch diameter opening fits standard 7-inch round flex duct or rigid branch runs
• Designed for low-pressure supply duct applications in residential and light commercial systems
• Reduces installation steps compared to separate takeoff and damper combinations

Compatibility

Designed as an OEM-style replacement and new-installation fitting for duct board trunk systems accepting a 7-inch round branch takeoff with integral damper.

Installation Notes

Installation is typically performed by licensed HVAC technicians or journeymen sheet metal workers. Power down the air handling unit and verify the system is de-energized before cutting into or modifying any duct section. Cut the duct board opening to the correct diameter, seat the tab collar firmly, and secure the perimeter per local mechanical code requirements. Follow applicable SMACNA and local mechanical code guidelines for duct board construction and branch connection sealing.

Technical Specifications

• Diameter: 7 inches
• Type: Tab Takeoff with Damper
• Application: Duct Board Systems

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84DBD07