Air Flow Products 84AT04 Stick-on Takeoff Flat Duct 4 in

Product Description

The AIR FLOW PRODUCTS 84AT04 is an airtight stick-on takeoff fitting designed for use with flat duct systems. It provides a sealed branch connection point where a round collar or flex duct run can be tapped off an existing flat duct trunk. The airtight construction reduces uncontrolled air leakage at the connection point, helping the system maintain designed static pressure and airflow distribution. This fitting is sized at 4 inches and is handled and installed by HVAC technicians and sheet metal mechanics during new construction and retrofit duct work.

This takeoff is suited for residential and light commercial HVAC duct systems where flat duct is used as the main trunk or distribution run. The stick-on design allows the fitting to be secured directly to the flat duct surface without cutting and framing a traditional collar opening in the same manner as a conventional saddle tap. It is a practical choice on jobs where speed of installation and airtightness at branch connections are both priorities.

Key Features

• Airtight construction limits air leakage at the branch tap point
• Stick-on attachment method speeds installation on flat duct trunks
• 4-inch collar size accommodates standard flex duct and round branch runs
• Designed for flat duct applications in residential and light commercial systems

Compatibility

Designed as an OEM-style replacement and new-installation fitting for flat duct trunk systems requiring a 4-inch airtight branch takeoff connection.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Power down the air handler and confirm the system is depressurized before making any duct modifications. Ensure the flat duct surface is clean and free of debris before applying the stick-on fitting to achieve a proper seal. Follow applicable mechanical codes, including SMACNA duct construction standards, for branch connection requirements in your jurisdiction.

Technical Specifications

• Collar Size: 4 inches
• Duct Type: Flat Duct
• Connection Style: Stick-On Takeoff
• Seal Type: Airtight

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84AT04