Air Flow Products 84RATD04 Stick-on Takeoff with Damper 4 in

Product Description

The AIR FLOW PRODUCTS 84RATD04 is an airtight stick-on takeoff fitting designed for round duct pipe with an integrated damper. This fitting mounts directly to the surface of a main trunk line using an adhesive-backed collar, eliminating the need to cut a separate collar opening in many applications. The built-in damper allows airflow balancing at the branch point without requiring a separate balancing damper downstream. At 4 inches in diameter, it is sized for standard residential and light commercial branch duct runs. HVAC installers and sheet metal mechanics use this fitting during new construction and retrofit duct fabrication work.

The 84RATD04 is suited for residential and light commercial forced-air HVAC systems where branch takeoffs are needed from a flat-sided rectangular or oval main trunk. The airtight construction helps maintain system static pressure and reduces conditioned air loss at the fitting joint, which is a common energy efficiency concern in duct systems. The integrated damper makes it practical for zoning adjustments and airflow balancing during system commissioning.

Key Features

• Airtight construction reduces air leakage at the trunk-to-branch connection
• Stick-on adhesive-backed collar simplifies installation without full collar cutout in many applications
• Integrated damper allows on-the-spot airflow balancing at the branch takeoff point
• 4-inch diameter fits standard residential branch duct runs
• Designed for round pipe branch connections off a main duct trunk

Compatibility

Designed as an OEM-style fitting for 4-inch round branch duct connections in residential and light commercial forced-air HVAC duct systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal mechanics. Shut down the air handler and confirm the system is de-energized before cutting into or modifying any duct section. The fitting should be sealed with UL 181-rated foil tape or mastic sealant at all joints to maintain airtight performance in accordance with local mechanical codes. Do not rely on the adhesive backing alone as the sole air seal without supplemental sealant per applicable code requirements.

Technical Specifications

• Pipe Diameter: 4 inches
• Takeoff Type: Stick-On Airtight with Integrated Damper
• Connection Style: Round pipe

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 84RATD04