8" Black Steel Butterfly Damper for Round Ceiling Diffuser, Plastic Key Handle

Product Overview

The 8" Neck black steel butterfly damper carries air through the opening through a ceiling opening. Powder-coated steel resists dents and rust for years of use, a stronger choice than lightweight plastic covers. This butterfly damper adjusts or shuts the airflow, so comfort can be set room by room. Select this butterfly damper by its neck size size, not the overall face size, so it seats correctly on the first fit.

Key Features

• Steel construction: Steel keeps the butterfly damper rigid during installation and resists warping over time.
• Black finish: The black finish coordinates with common flooring, trim, and hardware.
• Adjustable airflow: The built-in damper controls the volume of air (open to closed).
• Right-fit sizing: Ordered by neck size, this butterfly damper matches standard duct dimensions and cuts wrong-size returns.

Dimensions and Specifications

Is This the Right Vent for Your Opening?

Choose this butterfly damper to regulate the supply airflow behind a round ceiling diffuser. It installs inside the duct or neck behind the diffuser, and the plastic key handle turns it from fully open to closed. This is an airflow-control damper, not a supply or return grille.

How to Measure for This Vent

Measure the round duct or collar the diffuser connects to and match it to the 8" Neck neck size above. Do not measure the outer panel. The overall face measures 9-1/2".

Installation

Fit the butterfly damper into the round duct or neck behind the diffuser. Align it in the airway, then use the plastic key handle to open or close it to the airflow you want. No face screws are needed; the diffuser mounts over it.

What's Included

• 1 x butterfly damper
• 1 x plastic key handle
• Mounting screws

Ductwork, wall anchors, and installation tools are not included.

Care and Maintenance

Clean the butterfly damper with a soft, damp cloth and mild soap. Avoid abrasive chemicals that can damage the black finish. Dry the surface to keep moisture off the metal.

Compare Similar Options

Use this comparison to confirm the butterfly damper matches your opening and airflow need.