Hart Cooley 3806 Round Butterfly Damper 6 in T-bar Diffuser

Product Description

The HART COOLEY 3806 is an adjustable round butterfly damper designed for use with T-bar ceiling diffusers in light commercial and residential HVAC distribution systems. The damper mounts within the diffuser collar to provide manual airflow control at the terminal point of a supply air duct run. It ships with a removable adjustment handle, allowing the technician to set the blade position and remove the handle for a clean finished appearance. At 6 inches in diameter, it fits standard round collar openings and is finished in Golden Sand to coordinate with common T-bar ceiling tile systems. HVAC installers and sheet metal mechanics are the primary trades for this type of terminal accessory.

This damper is intended for use with 5400 Series and 6400 Series collars in T-bar ceiling grid installations. It is suited for light commercial office, retail, and institutional spaces as well as residential applications where round diffusers are installed in a suspended ceiling grid. The 6-inch size is a common fit for low-to-mid volume supply air outlets in these layouts. The butterfly blade design allows for field-adjustable airflow balancing without specialized tools.

Key Features

• Adjustable butterfly blade for manual airflow balancing at the diffuser
• Removable adjustment handle included for a finished installation appearance
• Golden Sand finish coordinates with standard T-bar ceiling diffuser aesthetics
• 6-inch diameter fits standard round T-bar diffuser collar openings
• Compatible with 5400 and 6400 Series collars

Compatibility

Designed for use with HART COOLEY 5400 and 6400 Series round collars for T-bar diffuser applications. Available in additional sizes: 6, 7, 8, 9, 10, 12, and 14 inches.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal mechanic as part of a supply air diffuser assembly. Shut down the air handling unit and confirm zero airflow before inserting or adjusting the damper. Set the blade to the desired position using the included handle, then remove the handle before securing the diffuser to the ceiling grid. Follow local mechanical codes and ASHRAE balancing guidelines when setting terminal device positions during system commissioning.

Technical Specifications

• Size: 6 inches
• Finish: Golden Sand
• Damper Type: Round Butterfly
• Handle: Removable, included
• Unit of Measure: Each
• Manufacturer Part Number (Alt): 50290

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 3806