Air Flow Products 84DB1508 Duct Board Tab Takeoff

Product Description

The AIR FLOW PRODUCTS 84DB1508 is a duct board tab takeoff fitting designed for connecting branch ducts to duct board trunk lines in low-pressure residential and light commercial HVAC distribution systems. This fitting features an 8-inch diameter opening with a 1.5-inch tab depth, allowing it to seat securely into duct board material for a clean, low-leak branch connection. HVAC installers and sheet metal technicians use tab takeoffs like this one to create reliable supply-air branch points without requiring additional adhesive collars or sheet metal screws at the connection point.

The 84DB1508 is suited for use in forced-air duct systems built with rigid fiberglass duct board. It is typically installed during new construction or duct system retrofit work where duct board trunk lines serve multiple supply-air branch runs. The tab design registers into the duct board surface to hold alignment during installation, which is especially useful in overhead or vertical duct runs where positioning can be difficult before the fitting is fully secured.

Key Features

• 8-inch diameter opening for standard branch duct connections
• 1.5-inch tab depth for positive registration into duct board material
• Tab design eliminates the need for additional mechanical fasteners at the duct board interface
• Compatible with low-pressure forced-air distribution systems
• Designed for use with rigid fiberglass duct board trunk construction

Compatibility

Designed as an OEM-style replacement and new-installation fitting for rigid fiberglass duct board HVAC distribution systems using 8-inch branch duct connections.

Installation Notes

Installation should be performed by a qualified HVAC technician following local mechanical codes and SMACNA duct construction standards. Shut down the air handling unit and confirm the system is de-energized before cutting into an existing duct board trunk. Use a sharp duct board knife and appropriate tab-hole template to cut a clean, snug opening in the duct board face before inserting the fitting. Seal all joints at the takeoff with approved duct board adhesive and UL 181B-rated tape to maintain system integrity.

Technical Specifications

• Diameter: 8 inches
• Tab Depth: 1.5 inches

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84DB1508