12" White Steel Round Ceiling Diffuser with Butterfly Damper & Handle, Supply Vent Cover for Round Neck Air Ducts

Product Overview

The 12" Neck white steel round ceiling diffuser carries supply air into the room through a ceiling opening. Powder-coated steel resists dents and rust for years of use, a stronger choice than lightweight plastic covers. A built-in damper adjusts or shuts the airflow, so comfort can be set room by room. Select this round ceiling diffuser 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 round ceiling diffuser rigid during installation and resists warping over time.
• White finish: The white 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 round ceiling diffuser matches standard duct dimensions and cuts wrong-size returns.

Dimensions and Specifications

Is This the Right Vent for Your Opening?

Choose this round ceiling diffuser if you need an adjustable supply-air vent for a ceiling opening. This round ceiling diffuser carries supply air and mounts on ceiling surfaces. It is not designed for floor installation or foot traffic, exterior or outdoor use, dryer exhaust venting or use as a filter-holding return grille. Confirm the airflow function against your HVAC layout before ordering.

How to Measure for This Vent

Measure the round duct or collar the diffuser connects to and match it to the 12" Neck neck size above. Do not measure the outer panel. The overall face measures 15-15/16".

Installation

Position the round ceiling diffuser over the duct neck opening with the louvers facing the room. Confirm the frame sits flush against the ceiling surface before marking the screw points. Secure it with the included screws without overtightening, since excess force can distort the frame.

What's Included

• 1 x round ceiling diffuser
• 1 x butterfly damper with key handle
• Mounting screws

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

Care and Maintenance

Clean the round ceiling diffuser with a soft, damp cloth and mild soap. Avoid abrasive chemicals that can damage the white finish. Dry the surface to keep moisture off the metal.

Compare Similar Options

Use this comparison to confirm the round ceiling diffuser matches your opening and airflow need.