Air Flow Products 840-1-ATD200-000008 Stick-on Takeoff Damper

Product Description

The AIR FLOW PRODUCTS 840-1-ATD200-000008 is an airtight stick-on takeoff fitting with an integrated damper, designed for use with flat duct systems. It measures 8 inches in diameter with a 2-inch standoff, allowing the fitting to clear insulation or other obstructions on the duct surface. The built-in damper gives installers direct airflow control at the branch point without the need for a separate damper assembly. HVAC technicians and sheet metal contractors install this fitting during new construction or retrofit applications where branch takeoffs are needed from flat trunk duct runs.

This takeoff is suited for residential and light commercial forced-air distribution systems that use flat duct as the main trunk. The stick-on design speeds installation by bonding directly to the duct surface, eliminating the need to cut and collar the trunk in a traditional manner. The airtight construction helps maintain system efficiency by minimizing conditioned air leakage at the branch connection. It is appropriate for supply-side duct systems where controlled branch airflow and low leakage are priorities.

Key Features

• Airtight construction minimizes conditioned air leakage at the branch takeoff point
• Integrated damper provides airflow control at the branch without a separate assembly
• Stick-on installation bonds directly to flat duct surface for faster field installation
• 2-inch standoff accommodates duct insulation or surface clearance requirements
• 8-inch diameter fits standard round branch duct connections

Compatibility

Designed as an OEM-style stick-on takeoff for flat trunk duct systems in residential and light commercial forced-air HVAC installations.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor. Power down the air handling unit and confirm the system is de-pressurized before cutting into or modifying any duct section. The stick-on surface must be clean, dry, and free of dust or grease for the adhesive bond to seat properly. Follow local mechanical codes and ACCA Manual D guidelines for branch takeoff sizing and placement.

Technical Specifications

• Diameter: 8 inches
• Standoff Height: 2 inches
• Duct Type: Flat Duct
• Damper: Integrated
• Construction: Airtight

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 840-1-ATD200-000008