Air Flow Products 84DBD12 Duct Board Tab Takeoff 12 in

Product Description

The AIR FLOW PRODUCTS 84DBD12 is a duct board tab takeoff fitting with an integrated damper, sized at 12 inches for use in low-pressure residential and light commercial HVAC duct systems. Tab takeoffs are used to branch supply air from a main duct board trunk line into individual run-outs or branch ducts. The built-in damper allows the installer to balance airflow at the takeoff point, reducing the need for downstream balancing dampers. This fitting is installed by sheet metal mechanics and HVAC technicians during system fabrication or renovation work.

This fitting is suited for duct board construction applications where a 12-inch branch connection is required off a main trunk. It is a common component in residential forced-air heating and cooling systems built with fiber duct board. The tab-style design locks into standard duct board panels and provides a secure, low-leakage connection point for branch ducts. The integral damper is particularly useful in zoned or multi-branch supply systems where individual branch airflow needs to be tuned after installation.

Key Features

• Integrated damper for on-site airflow balancing at the takeoff point
• Tab-style attachment designed for use with standard fiber duct board panels
• 12-inch opening size suits common residential branch duct runs
• Eliminates the need for a separate balancing damper on the branch run
• Designed for low-pressure supply air duct systems

Compatibility

Designed as an OEM-style replacement and new-construction fitting for standard fiber duct board trunk systems requiring a 12-inch tab takeoff with damper.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal mechanics. Power down the air handling unit and confirm the system is not pressurized before cutting into an existing trunk line. Tab takeoffs are seated and secured into duct board panels per the duct board manufacturer guidelines and should be sealed with approved duct board adhesive or foil tape meeting UL 181 standards. Set the integral damper position during system commissioning after measuring branch airflow.

Technical Specifications

• Size: 12 inches
• Type: Duct Board Tab Takeoff with Damper

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84DBD12