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The AIR FLOW PRODUCTS 84RAT08 is an airtight stick-on takeoff fitting designed for round duct pipe installations. This fitting connects a round branch duct to a main trunk line without cutting into the duct, relying on an adhesive mounting system to create a sealed connection. At 8 inches in diameter, it suits common residential and light commercial duct branch runs. HVAC installers and sheet metal technicians use this fitting to add or relocate supply branches efficiently while maintaining duct system integrity and minimizing air leakage at the takeoff point.
The 84RAT08 is suited for new construction and retrofit HVAC ductwork where a branch takeoff connection is needed on an existing or newly installed round trunk duct. The airtight design helps reduce uncontrolled air loss at the connection point, supporting overall system efficiency. It is appropriate for supply-side ductwork in forced-air heating and cooling systems where round pipe branch runs are specified.
Designed as an OEM-style replacement and new-installation fitting for round duct branch takeoff applications in residential and light commercial forced-air HVAC systems.
Installation is typically performed by a licensed HVAC technician or qualified sheet metal installer. The main trunk duct surface should be clean and free of dust, grease, or debris before applying the adhesive fitting to ensure a proper seal. Power down the air handling unit at the disconnect before working on any connected ductwork. Follow local mechanical codes and SMACNA guidelines for duct sealing and branch takeoff placement.
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