Air Flow Products 840-1-ATD200-000009 Stick-on Takeoff Damper

Product Description

The AIR FLOW PRODUCTS 840-1-ATD200-000009 is an airtight stick-on takeoff fitting with an integrated damper, designed for use with flat duct systems. The unit features a 9-inch opening and a 2-inch standoff, allowing it to be mounted directly onto flat duct surfaces without cutting a collar penetration through the duct wall. The built-in damper allows airflow to be adjusted or shut off at the branch point, giving installers direct zone control at the takeoff. HVAC technicians and sheet metal installers use this fitting in residential and light commercial forced-air distribution systems where airtight performance and quick installation are required.

This takeoff is suited for low-profile flat duct installations where space constraints rule out conventional collar-and-boot takeoffs. The adhesive-mount design speeds up installation on rectangular duct runs, making it a practical choice for attic, crawlspace, and tight-chase applications. The integrated damper eliminates the need for a separate balancing damper downstream, reducing part count and labor time on multi-branch supply systems.

Key Features

• Airtight construction minimizes conditioned-air leakage at the branch takeoff point
• Stick-on adhesive mount attaches directly to flat duct without penetrating the duct wall
• 9-inch opening size accommodates standard branch duct connections
• 2-inch standoff positions the takeoff away from the duct surface for branch flexibility
• Integrated damper provides airflow adjustment and shutoff at the takeoff
• Designed for flat duct systems common in low-clearance residential installations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for flat duct forced-air distribution systems requiring an airtight stick-on takeoff with damper at branch supply points.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified sheet metal installer. Power down the air handling unit and confirm the system is not pressurized before working on the duct branch. Ensure the flat duct surface is clean and free of dust or debris before applying the adhesive mount to achieve a proper airtight seal. Follow local mechanical codes and SMACNA duct sealing standards for supply-side branch connections.

Technical Specifications

• Opening Size: 9 inches
• Standoff Height: 2 inches
• Duct Type: Flat Duct
• Damper: Integrated
• Mount Type: Stick-On Adhesive
• Airtight: Yes

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 840-1-ATD200-000009