| Item No: | Nominal Size | Size (Duct Opening) | Model | Slots | Neck Size | Actual Size | Material | Outer Dimensions | Color | Airflow Direction | Bulk Pricing | Order | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2-10 | 11-20 | 21-49 | 50+ | 100+ | ||||||||||||
| 410201-2 | 12" Neck | Steel | 15-15/16" | White | $46.59 | $44.27 | $42.87 | $41.47 | $39.61 | ||||||||
| 410201-4 | 8" Neck | Steel | 11-15/16" | White | $50.99 | $48.45 | $46.92 | $45.39 | $43.35 | ||||||||
| 410201-3 | 6" Neck | Steel | 9-15/16" | White | $39.79 | $37.81 | $36.61 | $35.42 | $33.83 | ||||||||
| 410201-1 | 10" Neck | Steel | 13-15/16" | White | $47.29 | $44.93 | $43.51 | $42.09 | $40.20 | ||||||||
Steel Round Diffusers with Butterfly Damper
Steel round diffusers with butterfly dampers connect directly to round duct on the ceiling, combining outward air distribution and integrated airflow control in a single package. Within the Round Ceiling Diffusers & Dampers range, AirGrilles stocks the diffuser and damper assembly in 2 colors, black and white, across 4 neck sizes, 6, 8, 10, and 12 inches, sold with an integrated steel butterfly damper. The heavy-duty steel face wears a powder-coated finish, and the rear-mounted damper provides direct volume control via a key-handle mechanism. Bulk pricing runs across 6 quantity tiers with savings up to 30%, orders of 500+ units qualify for custom production, and in-stock items ship the same day on orders placed by 11AM ET.
An Integrated Round Diffuser and Damper Assembly
Steel round diffusers with butterfly dampers connect to round duct through a neck sized to match the duct, spreading air outward while allowing instant volume control at the face. Within the Round Ceiling Diffusers & Dampers range, this complete unit includes a butterfly damper mounted directly behind the diffuser face, so airflow adjustment is built into the assembly. The heavy-duty steel construction holds its shape on ceiling installs, and the powder-coated finish resists the scuffs and corrosion overhead moisture can cause. Once the neck size matches the duct, the complete unit mounts directly without requiring separate parts.
Controlling Airflow with an Integrated Butterfly Damper
Unlike a standalone diffuser, an assembly with a butterfly damper lets you set room air volume directly at the ceiling opening. Steel Butterfly Dampers are integrated behind the diffuser face, utilizing a key-handle mechanism that opens and closes the internal blades to adjust airflow. Ordering the diffuser and damper as a complete paired unit simplifies installation in rooms that require precise volume control. Match the assembly's neck size to your round duct size before ordering.
Neck Sizes, Colors, Bulk and Custom Orders
Round diffusers with butterfly dampers are ordered by neck size, the diameter of the round duct connection, rather than a width-by-height duct opening. AirGrilles stocks 4 neck sizes, 6, 8, 10, and 12 inches, in black and white powder-coated steel. Check each product listing for the face diameter that pairs with the neck size, since the face runs larger than the duct connection itself. Bulk pricing spans 6 quantity tiers, from 1 unit to 100+, with savings up to 30% at the higher tiers. Orders of 500+ units qualify for custom production depending on size, finish, and lead time, and in-stock items ship the same day on orders placed by 11AM ET.
Common Questions About Steel Round Diffusers with Butterfly Damper
These answers cover the damper operation, sizing, material, and ordering questions that come up most on steel round diffusers with dampers.
Does this round diffuser include a damper?
Yes, products in this collection ship complete with an integrated steel butterfly damper pre-attached to the diffuser neck, allowing direct airflow adjustment at the face.
How do I adjust the airflow on a diffuser with a butterfly damper?
Airflow is controlled directly through the front of the diffuser face using a plastic key-handle that opens or closes the rear butterfly blades without removing the unit from the ceiling.
How do I size a round diffuser with damper?
Measure the round duct's diameter and match it to the closest neck size, 6, 8, 10, or 12 inches. The visible face runs larger than the neck size itself, so check the face diameter on each product listing. Neck size, not the face diameter, is the number to match against the duct.
What if the room needs a square or rectangular diffuser instead?
Square Ceiling Diffusers spread air from a square face instead of a round one, for ceiling openings that are not connected to round duct. Round diffusers only fit a round duct connection at the listed neck size. Match the product to the duct shape before choosing a size.
What colors do steel round diffusers with dampers come in?
The range ships in black and white, both finished with a powder coat baked onto the steel. White blends into most ceiling colors, and black suits dark architectural ceilings. Check the product listing for the latest color availability by neck size.
Is there a bulk discount on round diffusers with dampers?
Yes, bulk pricing applies automatically across 6 quantity tiers, with savings up to 30% at the 50+ tier. Orders of 500+ units qualify for custom production depending on size, finish, and lead time. In-stock items ship the same day on orders placed by 11AM ET.
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