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The AIR FLOW PRODUCTS 84DBD16 is a duct board tab takeoff fitting with an integrated damper, designed for use in low-pressure residential and light commercial air distribution systems. This fitting connects branch ducts to a duct board trunk, allowing controlled airflow to individual zones or rooms. The built-in damper provides on-site volume control without the need for a separate balancing damper. At 16 inches, it suits larger branch runs common in residential new construction and retrofit duct systems. HVAC installers and sheet metal workers are the primary trades handling this fitting.
The 84DBD16 is suited for duct board plenum and trunk systems where branch takeoffs are needed at fixed intervals. It is commonly used in residential forced-air heating and cooling installations where duct board is the primary trunk material. The 16-inch size accommodates higher-volume branch runs serving larger rooms or multiple diffusers. This fitting is a practical choice for jobs requiring field-adjustable airflow without adding secondary hardware to the duct system.
Designed as an OEM-style replacement and new-installation fitting for duct board trunk systems used in residential and light commercial forced-air HVAC applications.
Installation is performed by licensed HVAC technicians or qualified sheet metal workers. Power down the air handler and confirm the system is depressurized before cutting into an existing duct board trunk. Secure the tab takeoff per the duct board manufacturer guidelines and seal all joints with approved duct mastic or UL 181-rated tape per local mechanical code requirements. Do not operate the system until all joints are fully sealed and the damper is set to the desired position.
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