Hart Cooley 155 12 Brn 12 Inch Ring Damper Assembly

Product Description

The HART COOLEY 155 12 brn is a 12-inch ring damper assembly designed for use with 12-inch 150 series diffusers and grilles. This assembly provides airflow control at the register or diffuser level, allowing technicians to balance air distribution across supply outlets. The ring damper mounts directly behind the face of compatible diffusers, giving HVAC installers a straightforward way to throttle or redirect conditioned air without modifying the ductwork. It is a standard component in residential and light commercial forced-air systems where zone-level flow adjustment is required.

This ring damper assembly is suited for installation in ceiling or wall supply outlets using 12-inch diffusers from the 150 series product line. HVAC technicians and sheet metal contractors typically install this component during new construction rough-in or as a replacement part during a service call when the original damper is damaged or missing. The brown finish coordinates with diffuser face aesthetics in certain interior applications.

Key Features

• 12-inch ring damper sized for 12-inch 150 series diffusers
• Provides airflow balancing at the supply outlet without duct modification
• Ring-style assembly for direct installation behind diffuser face
• Brown finish for aesthetic coordination with compatible diffuser faces
• Metal construction for durability in forced-air supply applications

Compatibility

Designed as an OEM-style replacement ring damper assembly for use with 12-inch 150 series diffusers and grilles.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal contractor. Shut down the air handling unit and confirm airflow has stopped before removing the existing diffuser or damper assembly. The ring damper seats behind the diffuser face; ensure the damper blade moves freely and seats correctly before reinstalling the diffuser. Follow local mechanical codes and the system manufacturer guidance for airflow balancing procedures.

Technical Specifications

• Nominal Size: 12 inches
• Finish: Brown
• Compatible Series: 150
• Assembly Type: Ring Damper

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 155 12 brn