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Plastic Diffusers

Non-corrosive plastic ceiling registers, vents and air returns are ideal for wet and humid areas such as kitchens, locker rooms, showers, indoor pools, dishwashing areas and medical MRI rooms. Larger 2'x2' are made to be installed into a ceiling grid system while our smaller 12" x 12" plastic vents are ideal for rest rooms and showers.

Ceiling Repairs

Black soot and dust on your ceiling tiles can be expensive and difficult to clean or replace. Avoid damage to the ceiling tiles surrounding your ceiling diffusers by installing our unique ceiling dust deflectors. carries many innovative repair products and even offers How-To videos for the do-it-yourselfers.

Air Diverters

Block and redirect annoying drafts from square 2'x2' ceiling diffusers and linear ceiling vents. Our diverters install quickly without the need for tools. Stay comfortable while sitting at your work station. Ideal for offices, restaurants, commercial kitchens and medical facilities.

6", 8" 10", 12", 14" available. (This is made for a 10" HVAC collar)

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  • View the how to pictorial by clicking "next"
  • 6", 8" 10", 12", 14" available. (This is made for a 10" HVAC collar)
  • Damper with included key
  • Remove center plug.
  • Remove front 2 fins.
  • Measure before ordering
  • Use cordless drill
  • Use self tapping screws. 4 screws included per damper
  • Damper with fins down (closed position)
  • Plastic key included
  • Replace front 2 fins. Open and close damper with provided plastic key.

Butterfly Air Dampers (#4944-xx)

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Product Name Price Qty
Butterfly Air Damper 6"(4944-06) $18.99
Butterfly Air Damper 8"(4944-08) $19.99
Butterfly Air Damper 10"(4944-10) $20.99
Butterfly Air Damper 12"(4944-12)-OUT OF STOCK $21.99
Out of stock.
Butterfly Air Damper 14"(4944-14) $23.99

Availability: In stock.


Quick Overview

Install Air Dampers in the existing HVAC diffusers to restrict air flow.


Butterfly Air Damper

If you have one or more air diffusers that you want to restrict air flow from, then this butterfly air damper provides the easy and affordable solution. All you need to install it is a cordless drill and two self-tapping screws. In order to ensure optimal air restriction, you should measure the collar size or diameter of the diffuser before ordering your air damper.

At, we carry duct dampers in a variety of diameters, including 6”, 8”, 10”, 12”, and 14”. Once installed, this butterfly damper will provide immediate air flow restriction to the duct. You can even re-install the vent cover to the damper so your ceiling will look complete. Commercial HVAC systems cannot be altered once they are installed, so this simple and easy-to-install option allows you to block any unwanted air flow from any part of the space you wish. Shop at and save on all of your ceiling repair needs.

Additional Information

Item # 4944-xx

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