Air Flow Products 84DBD204 Duct Board Tab Takeoff 4 in

Product Description

The AIR FLOW PRODUCTS 84DBD204 is a 4-inch duct board tab takeoff fitting with an integrated damper, designed for use in fibrous glass duct board HVAC distribution systems. The tab-style design allows the fitting to lock securely into duct board without requiring separate fasteners at the takeoff point. The built-in damper gives the installer direct airflow control at the branch point, making balancing residential or light commercial duct systems faster during commissioning. HVAC technicians and sheet metal installers working with duct board systems are the primary installers of this fitting.

This fitting is suited for residential and light commercial forced-air HVAC applications where fibrous glass duct board is used as the primary distribution medium. The 4-inch diameter makes it a common choice for individual room supply branches off a main duct board trunk. The integrated damper eliminates the need to install a separate inline damper downstream, saving time on system balancing at startup.

Key Features

• 4-inch diameter tab takeoff sized for standard branch supply runs
• Integrated damper allows airflow balancing directly at the branch takeoff point
• Tab design locks into duct board for a secure, tool-friendly installation
• Eliminates need for a separate inline balancing damper on the branch

Compatibility

Designed as an OEM-style replacement or new-install fitting for fibrous glass duct board HVAC distribution systems requiring a 4-inch tab takeoff with damper.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified sheet metal installer. The air handling unit or furnace should be powered down and the system de-energized before cutting into the duct board and installing any takeoff fitting. Use tools and adhesives appropriate for fibrous glass duct board as specified by the duct board manufacturer and local mechanical codes. Ensure the damper blade moves freely and is set to the desired position before sealing the duct system.

Technical Specifications

• Diameter: 4 inches
• Type: Tab Takeoff with Damper
• Application: Fibrous Glass Duct Board Systems

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84DBD204