Air Flow Products 84DB20 Duct Board Tab Takeoff 20 in

Product Description

The AIR FLOW PRODUCTS 84DB20 is a duct board tab takeoff designed for use in fibrous glass duct board HVAC systems. This fitting creates a branch connection point on a main duct board trunk, allowing airflow to be directed into a lateral or branch run. At 20 inches in size, it suits larger trunk-to-branch transitions common in commercial and residential forced-air systems. Licensed HVAC sheet metal technicians and duct fabricators install this fitting during new construction and retrofit ductwork projects.

The 84DB20 is sized for 20-inch duct board applications and is suited to supply air distribution systems where fibrous glass duct board is the primary construction material. It is commonly used in trunk-and-branch duct layouts where a tab-style takeoff provides a secure mechanical connection between the main duct and a branch run. This fitting is appropriate for both new installation and replacement scenarios in light commercial and residential forced-air systems.

Key Features

• 20-inch size fits large trunk duct board sections
• Tab design provides a secure mechanical engagement with duct board material
• Takeoff configuration supports clean branch connections from the main trunk
• Suited for fibrous glass duct board construction methods

Compatibility

Designed as an OEM-style replacement and standard fitting for fibrous glass duct board HVAC duct systems requiring a tab-style takeoff at the 20-inch size.

Installation Notes

Installation should be performed by a qualified HVAC technician familiar with duct board fabrication practices. Shut down the air handling unit and de-energize the system before beginning ductwork modifications. Secure the takeoff to the duct board using appropriate duct board adhesive and mechanical fasteners per local mechanical code requirements. Seal all joints with listed duct sealant or UL 181B-compliant tape to meet energy code and leakage standards.

Technical Specifications

• Size: 20 inches
• Type: Duct Board Tab Takeoff
• Series: 84DB

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84DB20