Front of 12 Inch 3 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Side of 12 Inch 3 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Top of 12 Inch 3 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Kitchen View of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
Living Room View of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
Lifestyle 3 of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
Brochure of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
  • Front of 12 Inch 3 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Side of 12 Inch 3 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Top of 12 Inch 3 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Kitchen View of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
  • Living Room View of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
  • Lifestyle 3 of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
  • Brochure of 12 Inch 3 Slot Linear Air Vent Plenum Box - 12 Inch 3 Slot Linear Diffuser HVAC Duct - Texas Buildmart
Texas Buildmart

BUILDMART - 12 Inch Plenum Box for [12 Inch Linear Slot Diffuser - 3 Slot - Triple Slot] Premium Insulated Plenum Box for Heating and Cooling - Texas Buildmart

Regular price $79.99 Sale price $99.99 Unit price per

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  • Galvanized sheet metal Plenum Box with foam insulation, ideal for Texas Buildmart 12" lineal slot diffuser. This air-distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air. Connects to: 9" flexible duct in oval shape. Can be used and brazed to a 4" or 6" wood stud. If you do not have this size flex, you can use a reducer to modify the size. Professional HVAC Installer is Recommended.
  • Ideal for Texas Buildmart 12" Lineal Slot Diffuser - 3 Slot
  • Galvanized sheet metal Plenum Box with foam insulation
  • Total Box Dimensions: L: 13 1/4" W: 6 3/16" H: 12"
  • Mouth Dimensions: L: 11 7/8" W: 4 3/4"
  • Entry size: 9" flex in oval shape
  • This air-distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air
  • If you do not have this size flex, you can use a reducer to modify the size
12" 3 slot linear diffuser

 

Here's a link to the Diffuser that fits this Plenum Box:

12" Linear Slot Diffuser - 3 Slot - Triple Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings, Walls & Floors - Commercial Grade HVAC Registers, Grilles & Vents - Home Decor & Wall Decor for Amazon Home

 

12 3 slot vent

 

 

Here's a link to the Diffuser that fits this Plenum Box:

12" Linear Slot Diffuser - 3 Slot - Triple Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings, Walls & Floors - Commercial Grade HVAC Registers, Grilles & Vents - Home Decor & Wall Decor for Amazon Home

How to install Standard Linear Slot Diffuser:


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April V. Verified Customer   
07-20-25

Great and responsive customer service, love the vent covers. Very stylish and good quality

Eddie B. Verified Customer   
07-20-25
A L. Verified Customer   
07-19-25

Great looking fit nicely

Questions & Answers
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Popular Questions

1 year ago
This is for the heat/ac outlet in my kitchen. I do not have access to the air duct above. How can I put it up and ensure it doesn't fall down?
1 year ago
Hi there!

Absolutely, this vent is suitable for use in a kitchen setting. It can be installed without accessing the air duct. The installation process involves screwing it into the side of the vent, securing it with the register box that connects to the duct. This ensures stability and prevents it from falling down. If you have any further questions or need assistance with installation, please feel free to reach out at (956)900-1103. We're here to help
11 months ago
11 months ago
Hey there,
With our vents you would have to measure from the opening itself.
In this case you would go with the 10x10
Hope this helps, have a great day.
7 months ago
7 months ago

Our linear slot diffusers can be compatible with 300mm (12-inch) ducting, but it may depend on the specific installation requirements and the transition from round ducting to the diffuser. You might need a plenum or an adapter to properly connect the diffuser to your ducting…

See full answer »
1 year ago
Can these AC Linear diffuser be directed?
How will it be directed and how much can they be directed?
1 year ago
I want to know the difference so I know what to buy, do I need a standard diffuser or a linear diffuser to exchange from my old traditional vent covers.
1 year ago
Greetings, Thank you for your inquiry at Texas Buildmart. Our Modern AC Vent Cover has unique attributes compared to standard diffusers. Our linear diffuser's slender design offers a modern aesthetic while also providing superior airflow. It's streamlined, allowing for a 180-degree airflow spread, a feature that surpasses standard diffusers' 90-degree limitation. Additionally, our standard diffusers come pre-fitted for standard sizes, enabling a straightforward replacement process. If you seek a sleek, efficient diffuser, our Modern AC Vent Cover is an excellent choice.
1 year ago
I am trying to find the proper CFM for a 12" vent cover I have in my living room but I don't know where to start
1 year ago
The CFM, or Cubic Feet per Minute, refers to the volume of air exchanged in a room per minute. It's calculated by dividing the room's volume by the air changes per hour. On average, a typical room undergoes around 7 air changes per hour. This figure is dependent on how often the air is recycled back to your return.
1 year ago
Do these diffuser allow lower noise criteria? Or will it be the same as regular vents.
1 year ago
Hello there, Thank you for contacting Texas Buildmart. Our linear diffusers and standard units will provide a similar level of airflow as your CFM requirement. For instance, our linear diffusers can match the maximum airflow of your current 10x6 traditional vent cover, with the added advantage of enabling better air diffusion. For any further queries, feel free to reach us directly at (956)900-1103. Thank you.
1 year ago
Would you have these in only black and white?
1 year ago


Greetings, Thank you for your inquiry at Texas Buildmart. We appreciate your interest. To answer your question, the items are indeed available in just black and white. However, they are paintable with any oil-based paint or epoxy, offering customization possibilities. If you need further assistance or have more queries, feel free to contact us directly at (956)900-1103. We're always here to help. … See full answer »
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