Hart Cooley 155 08 Brn 8 Inch Ring Damper Assembly

Product Description

The HART COOLEY 155 08 brn is an 8-inch ring damper assembly designed for use with 8-inch 150-series duct fittings. Ring dampers control airflow volume at the branch or outlet point in a ducted HVAC distribution system. This assembly mounts inside the duct collar and uses a rotating ring mechanism to open, close, or throttle the air passage. HVAC installers and sheet metal contractors use this type of damper during balancing of residential and light commercial forced-air systems. The brown color designation identifies the size coding used in the 155 product series.

This ring damper assembly is intended for use in 8-inch round duct systems, specifically as a companion component to the 150-series register and grille fittings. It is installed at the neck of a supply air outlet to allow volume adjustment at each diffuser or register location. Typical applications include residential forced-air heating and cooling systems where individual room airflow balancing is required. The assembly fits within the standard 8-inch collar opening and is secured without specialized tooling.

Key Features

• 8-inch nominal size matches standard 8-inch round duct collar openings
• Ring-style damper mechanism allows incremental airflow adjustment
• Designed as a matched assembly for use with 150-series duct fittings
• Metal construction suitable for supply air duct applications
• Color-coded brown for quick size identification during installation

Compatibility

Designed as an OEM-style replacement and accessory component for use with HART COOLEY 8-inch 150-series round duct fittings and register boot assemblies.

Installation Notes

Ring damper assemblies are installed by sheet metal contractors or licensed HVAC technicians as part of a ducted air distribution system. Shut down the air handling unit and isolate power to the system before accessing duct components. The damper should be seated fully in the collar before securing the register or grille. Follow local mechanical codes and SMACNA duct construction standards for proper fitment and sealing.

Technical Specifications

• Duct Size: 8 inches
• Series: 155
• Color Code: Brown
• Material: Metal
• Assembly Type: Ring Damper

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 155 08 brn