Air Flow Products 840-1-ATD200-000007 Stick-on Takeoff Damper

Product Description

The AIR FLOW PRODUCTS 840-1-ATD200-000007 is an airtight stick-on takeoff fitting with an integrated damper, designed for use with flat duct systems. It features a 7-inch collar and a 2-inch standoff profile, making it suitable for low-clearance installations where standard takeoff fittings will not fit. The built-in damper allows for airflow adjustment at the branch point without the need for a separate damper component. Licensed HVAC technicians and sheet metal installers are the primary tradespeople who work with this fitting during duct fabrication or retrofit projects.

This takeoff is intended for residential and light commercial duct systems that use flat or low-profile ductwork configurations. The stick-on design allows it to be secured directly to the flat duct surface, simplifying installation in tight spaces such as floor cavities, dropped ceilings, or between-joist runs where conventional round or rectangular collars are impractical. The integrated damper provides branch-level balancing capability at the point of takeoff.

Key Features

• Airtight construction minimizes conditioned-air leakage at the branch connection
• Stick-on mounting attaches directly to flat duct surface without additional framing
• Integrated damper allows airflow adjustment at the takeoff point
• 7-inch collar size suits common branch duct diameters
• 2-inch standoff profile supports low-clearance installation environments

Compatibility

Designed as an OEM-style replacement or new-installation component for flat duct systems requiring an airtight stick-on takeoff with damper functionality.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal worker. Shut down the air handling unit and confirm the system is depressurized before cutting into the duct or applying the fitting. Follow local mechanical codes and SMACNA duct construction standards for sealing and support requirements. Do not operate the damper adjustment without verifying the fitting is fully adhered and sealed to the duct surface.

Technical Specifications

• Collar Size: 7 inches
• Standoff Height: 2 inches
• Duct Type: Flat Duct
• Damper: Integrated
• Mounting Style: Stick-On

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 840-1-ATD200-000007