Front of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Side of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Top of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Lifestyle 1 of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Lifestyle 2 of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Lifestyle 3 of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Brochure of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Front of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Side of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Top of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Lifestyle 1 of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Lifestyle 2 of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Lifestyle 3 of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
  • Brochure of 36 Inch 2 Slot Linear Slot Plenum Box - Linear Slot Diffuser Plenum - Texas Buildmart - AC Vent Covers - Linear Plenum Box
Texas Buildmart

BUILDMART - 36" Plenum Box for [36" Linear Slot Diffuser - 2 Slot - Double Slot] Premium Insulated Plenum Box for Heating and Cooling - Texas Buildmart

Regular price $149.99 Sale price $199.99 Unit price per

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  • Galvanized sheet metal Plenum Box with foam insulation, ideal for Texas Buildmart 36" lineal slot diffuser. This air-distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air. Connects to: 10" 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 36" Lineal Slot Diffuser - 2 Slot
  • Galvanized sheet metal Plenum Box with foam insulation
  • Total Box Dimensions: L: 36 7/8" W: 4 5/8" H: 11 7/8"
  • Mouth Dimensions: L: 35 3/4" W: 3 1/4"
  • Entry size: 10" 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

36" 2 slot linear diffuser

 

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

36" Linear Slot Diffuser - 2 Slot - Double 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

 

36" 2 slot linear slot diffuser black

 

 

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

36" Linear Slot Diffuser - 2 Slot - Double 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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WAYNE A. Verified Customer   
08-28-25

NICE PRODUCT BUT COULD USE BETTER PACKAGING , ALL BOXES WERE DAMAGED IN SOME FORM OR ANOTHER , BENT CORNERS , DAMAGED COLLARS

Paul R. Verified Customer   
05-11-24

Product was damaged during shipping

Dan G. Verified Customer   
03-25-24
Worth the price.

Liked the product and how easy it was to put together. Also it's an all in one stop so no dealing with a sheet metal shop and no figuring out what size box to get for the grill. Price was pretty good also. Would use again!

Questions & Answers
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Popular Questions

1 year ago
1 year ago
Hello there, Thank you for reaching out with your query regarding the insulation on the plenum box. Unfortunately, we are unable to offer the plenum box without insulation at this time. However, if you prefer not to have insulation due to the high humidity in the installation area, you can remove it yourself. The insulation can be stripped from the register box as needed. We appreciate your understanding in this matter. If you have any further questions or if there's anything else we can assist you with, please feel free to let us know at (956)900-1103.
Thank you.
1 year ago
Hello there, can you guys place the entry on the side of a 36" Plenum Box for [36" Linear Slot Diffuser - 2 Slot - Double Slot]
1 year ago

Hey there,


See full answer »
1 year ago
I have a slab on grade home, which I’m trying to use your linear diffusers but I believe my sauna duct and Plenum boxes need to be waterproof so they don’t rust
1 year ago
Thank you for reaching out to us regarding your slab-on-grade home and the use of our linear diffusers.

While our linear diffusers are designed for ceiling installations and may not have been specifically tested for floor installations in slab-on-grade homes, we appreciate your interest in our products. Given the potential moisture exposure in your sauna duct and plenum boxes, we understand the importance of using waterproof materials to prevent rust. … See full answer »
1 year ago
1 year ago
Hello, Thank you for your interest in our BUILDMART - 12x4 Modern AC Vent Cover. We appreciate your inquiry about a bulk discount, however, the price listed on our website is already our most competitive rate. We aim to offer top quality products at the best possible prices. For any further queries or assistance, please feel free to call us at (956)900-1103.
1 year ago
1 year ago
We ship out the same day or the next business day, with delivery taking 3-5 days to arrive. If you have any further questions, please contact us at 956-900-1103.
1 year ago
I want to place an order and I want to know if the items are always in stock or is there a lead time?
1 year ago
Greetings! We appreciate your interest in Texas Buildmart. We ensure that our products are constantly in stock and prepared for immediate dispatch, either on the same day or the next business day. Expected delivery time is within 2-5 days. For any further queries, feel free to contact us directly at (956)900-1103.
1 year ago
Are there any discounts for large order for more than 10 items?
1 year ago
Hello, Thank you for contacting us at Texas Buildmart. We're always ready to assist you. Currently, we don't offer quantity discounts or promotional codes. Rest assured, the prices on our LinearSlotDiffusers.com website are the best we can offer. We aim to provide high-quality products at competitive rates. If you have more questions, feel free to ask. We're here to help.
1 year ago
I want one with out paint, is this possible?
1 year ago
Greetings, Thank you for contacting LinearSlotDiffusers.com. We appreciate your inquiry regarding our vent covers. Unfortunately, we do not offer an aluminum finish. Our diffusers come with an electrostatic finish in either white or black. Despite this, you can personalize the product by painting it with any oil-based paint or epoxy, which will adhere to the coating. For further assistance, feel free to reach us directly at (956)900-1103. Thank you!
1 year ago
On the website it shows the measurements of the inside and outside dimensions.
It doesn't show the depth of the vent cover, could you tell us the depth of the vent cover?
Thank you.
1 year ago
Greetings, Thank you for your inquiry with LinearSlotDiffusers.com. The depth of our linear and standard vent covers is uniformly measured at 1 3/4". This measurement spans from the top faceplate to the bottom of the vent neck. Should you require further information or have additional questions, please don't hesitate to ask. We're always here to assist you!
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Customer Reviews

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B
BRIAN

The 36” plenum box came dented and bent in the middle of the plenum vent mouth. Also, there was a piece of loose metal shipped in the inside of the plnum that cut up the foam sound dedening material.
I also ordered a 24 inch and a 12 inch plenum box which both came in great shape.
Disappointed in the condition of the 36 inch box.


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