Air Flow Products 84DB18 Duct Board Tab Takeoff 18 in

Product Description

The AIR FLOW PRODUCTS 84DB18 is an 18-inch duct board tab takeoff fitting used in low-pressure sheet metal and duct board distribution systems. Tab takeoffs provide a direct branch connection point on a main duct run, allowing installers to tap off supply air to individual zones or registers without field-fabricating a transition. This fitting is sized at 18 inches and is designed for use with duct board construction methods common in residential and light commercial HVAC installations. HVAC sheet metal mechanics and duct fabricators are the primary installers of this fitting type.

Tab takeoffs like the 84DB18 are used in forced-air supply duct systems where duct board is the primary construction material. They are typically installed on rectangular main trunk lines and allow branch runs to be connected cleanly and consistently. This fitting suits residential new construction and retrofit applications where duct board trunk-and-branch layouts are specified by the mechanical contractor or system designer.

Key Features

• 18-inch size for direct branch connection on duct board main trunk lines
• Tab-style design integrates with duct board construction methods
• Supports low-pressure forced-air supply distribution systems
• Eliminates the need for field-fabricated branch transitions at the trunk

Compatibility

Designed as an OEM-style fitting for duct board HVAC distribution systems where tab takeoff connections are required at the main trunk line.

Installation Notes

Installation should be performed by a licensed HVAC mechanic or qualified sheet metal installer. Power down the air handling unit and confirm the system is de-energized before cutting into an existing duct run. Secure all connections per local mechanical codes and the applicable sections of the SMACNA Duct Construction Standards. Seal all joints with code-approved duct tape or mastic appropriate for duct board assemblies.

Technical Specifications

• Size: 18 inches
• Type: Duct Board Tab Takeoff
• Series: 84DB

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84DB18