Air Flow Products 84AT18 Stick-on Takeoff Flat Duct 18 in

Product Description

The AIR FLOW PRODUCTS 84AT18 is an airtight stick-on takeoff fitting designed for flat duct systems. It provides a secure, sealed branch connection point directly on flat duct without requiring cutting or sheet metal fabrication beyond the takeoff opening. The adhesive-backed design speeds up installation and reduces air leakage at the branch point, making it a practical choice for residential and light commercial HVAC duct distribution work. At 18 inches, it suits a range of branch duct runs where a clean, low-leakage connection is required.

This takeoff is used in forced-air HVAC systems where flat duct serves as the main trunk or branch distribution pathway. It is suited for residential new construction and retrofit applications where maintaining duct airtightness is a priority. HVAC installers and sheet metal mechanics use this fitting when branch taps need to be added to flat duct runs without compromising the integrity of the duct system. The stick-on installation method makes it well-suited for tight ceiling or crawlspace installations where access is limited.

Key Features

• Airtight construction minimizes air leakage at branch takeoff points
• Stick-on adhesive backing eliminates the need for separate fasteners at the seal point
• Designed specifically for flat duct applications
• 18-inch size accommodates a range of branch duct run requirements
• Simplifies branch connections in new construction and retrofit duct work

Compatibility

Designed as an OEM-style replacement and new-installation fitting for flat duct HVAC distribution systems requiring airtight branch takeoff connections.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal mechanics. The duct system should be depressurized and the air handler powered down before cutting into any existing duct run. Ensure the flat duct surface is clean and free of dust or grease before applying the adhesive-backed fitting to achieve a proper airtight seal. Local mechanical codes and ASHRAE duct leakage standards may apply to the installation.

Technical Specifications

• Size: 18 inches
• Duct Type: Flat Duct
• Connection Style: Stick-On Takeoff
• Seal Type: Airtight

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84AT18